1998880000

素因数分解:

$2^8\times 5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^2$

素因数の和:111

約数の個数: 270

約数和(自身を含む): 5548163082

約数和(自身を除く): 3549283082

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 32, 40, 50, 52, 62, 64, 65, 80, 100, 104, 124, 125, 128, 130, 155, 160, 200, 208, 248, 250, 256, 260, 310, 320, 325, 400, 403, 416, 496, 500, 520, 620, 625, 640, 650, 775, 800, 806, 832, 961, 992, 1000, 1040, 1240, 1250, 1280, 1300, 1550, 1600, 1612, 1625, 1664, 1922, 1984, 2000, 2015, 2080, 2480, 2500, 2600, 3100, 3200, 3224, 3250, 3328, 3844, 3875, 3968, 4000, 4030, 4160, 4805, 4960, 5000, 5200, 6200, 6400, 6448, 6500, 7688, 7750, 7936, 8000, 8060, 8125, 8320, 9610, 9920, 10000, 10075, 10400, 12400, 12493, 12896, 13000, 15376, 15500, 16000, 16120, 16250, 16640, 19220, 19375, 19840, 20000, 20150, 20800, 24025, 24800, 24986, 25792, 26000, 30752, 31000, 32000, 32240, 32500, 38440, 38750, 39680, 40000, 40300, 41600, 48050, 49600, 49972, 50375, 51584, 52000, 61504, 62000, 62465, 64480, 65000, 76880, 77500, 80000, 80600, 83200, 96100, 99200, 99944, 100750, 103168, 104000, 120125, 123008, 124000, 124930, 128960, 130000, 153760, 155000, 160000, 161200, 192200, 198400, 199888, 201500, 208000, 240250, 246016, 248000, 249860, 251875, 257920, 260000, 307520, 310000, 312325, 322400, 384400, 399776, 403000, 416000, 480500, 496000, 499720, 503750, 515840, 520000, 600625, 615040, 620000, 624650, 644800, 768800, 799552, 806000, 961000, 992000, 999440, 1007500, 1040000, 1201250, 1230080, 1240000, 1249300, 1289600, 1537600, 1561625, 1599104, 1612000, 1922000, 1998880, 2015000, 2080000, 2402500, 2480000, 2498600, 2579200, 3075200, 3123250, 3198208, 3224000, 3844000, 3997760, 4030000, 4805000, 4960000, 4997200, 6150400, 6246500, 6448000, 7688000, 7808125, 7995520, 8060000, 9610000, 9994400, 12493000, 12896000, 15376000, 15616250, 15991040, 16120000, 19220000, 19988800, 24986000, 30752000, 31232500, 32240000, 38440000, 39977600, 49972000, 62465000, 64480000, 76880000, 79955200, 99944000, 124930000, 153760000, 199888000, 249860000, 399776000, 499720000, 999440000, 1998880000]

約数ペア:

[(1, 1998880000), (2, 999440000), (4, 499720000), (5, 399776000), (8, 249860000), (10, 199888000), (13, 153760000), (16, 124930000), (20, 99944000), (25, 79955200), (26, 76880000), (31, 64480000), (32, 62465000), (40, 49972000), (50, 39977600), (52, 38440000), (62, 32240000), (64, 31232500), (65, 30752000), (80, 24986000), (100, 19988800), (104, 19220000), (124, 16120000), (125, 15991040), (128, 15616250), (130, 15376000), (155, 12896000), (160, 12493000), (200, 9994400), (208, 9610000), (248, 8060000), (250, 7995520), (256, 7808125), (260, 7688000), (310, 6448000), (320, 6246500), (325, 6150400), (400, 4997200), (403, 4960000), (416, 4805000), (496, 4030000), (500, 3997760), (520, 3844000), (620, 3224000), (625, 3198208), (640, 3123250), (650, 3075200), (775, 2579200), (800, 2498600), (806, 2480000), (832, 2402500), (961, 2080000), (992, 2015000), (1000, 1998880), (1040, 1922000), (1240, 1612000), (1250, 1599104), (1280, 1561625), (1300, 1537600), (1550, 1289600), (1600, 1249300), (1612, 1240000), (1625, 1230080), (1664, 1201250), (1922, 1040000), (1984, 1007500), (2000, 999440), (2015, 992000), (2080, 961000), (2480, 806000), (2500, 799552), (2600, 768800), (3100, 644800), (3200, 624650), (3224, 620000), (3250, 615040), (3328, 600625), (3844, 520000), (3875, 515840), (3968, 503750), (4000, 499720), (4030, 496000), (4160, 480500), (4805, 416000), (4960, 403000), (5000, 399776), (5200, 384400), (6200, 322400), (6400, 312325), (6448, 310000), (6500, 307520), (7688, 260000), (7750, 257920), (7936, 251875), (8000, 249860), (8060, 248000), (8125, 246016), (8320, 240250), (9610, 208000), (9920, 201500), (10000, 199888), (10075, 198400), (10400, 192200), (12400, 161200), (12493, 160000), (12896, 155000), (13000, 153760), (15376, 130000), (15500, 128960), (16000, 124930), (16120, 124000), (16250, 123008), (16640, 120125), (19220, 104000), (19375, 103168), (19840, 100750), (20000, 99944), (20150, 99200), (20800, 96100), (24025, 83200), (24800, 80600), (24986, 80000), (25792, 77500), (26000, 76880), (30752, 65000), (31000, 64480), (32000, 62465), (32240, 62000), (32500, 61504), (38440, 52000), (38750, 51584), (39680, 50375), (40000, 49972), (40300, 49600), (41600, 48050)]