1289600000

素因数分解:

$2^{10}\times 5^5\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:89

約数の個数: 264

約数和(自身を含む): 3582020736

約数和(自身を除く): 2292420736

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, 512, 520, 620, 625, 640, 650, 775, 800, 806, 832, 992, 1000, 1024, 1040, 1240, 1250, 1280, 1300, 1550, 1600, 1612, 1625, 1664, 1984, 2000, 2015, 2080, 2480, 2500, 2560, 2600, 3100, 3125, 3200, 3224, 3250, 3328, 3875, 3968, 4000, 4030, 4160, 4960, 5000, 5120, 5200, 6200, 6250, 6400, 6448, 6500, 6656, 7750, 7936, 8000, 8060, 8125, 8320, 9920, 10000, 10075, 10400, 12400, 12500, 12800, 12896, 13000, 13312, 15500, 15872, 16000, 16120, 16250, 16640, 19375, 19840, 20000, 20150, 20800, 24800, 25000, 25600, 25792, 26000, 31000, 31744, 32000, 32240, 32500, 33280, 38750, 39680, 40000, 40300, 40625, 41600, 49600, 50000, 50375, 51584, 52000, 62000, 64000, 64480, 65000, 66560, 77500, 79360, 80000, 80600, 81250, 83200, 96875, 99200, 100000, 100750, 103168, 104000, 124000, 128000, 128960, 130000, 155000, 158720, 160000, 161200, 162500, 166400, 193750, 198400, 200000, 201500, 206336, 208000, 248000, 251875, 257920, 260000, 310000, 320000, 322400, 325000, 332800, 387500, 396800, 400000, 403000, 412672, 416000, 496000, 503750, 515840, 520000, 620000, 640000, 644800, 650000, 775000, 793600, 800000, 806000, 832000, 992000, 1007500, 1031680, 1040000, 1240000, 1259375, 1289600, 1300000, 1550000, 1600000, 1612000, 1664000, 1984000, 2015000, 2063360, 2080000, 2480000, 2518750, 2579200, 2600000, 3100000, 3200000, 3224000, 3968000, 4030000, 4160000, 4960000, 5037500, 5158400, 5200000, 6200000, 6448000, 8060000, 8320000, 9920000, 10075000, 10316800, 10400000, 12400000, 12896000, 16120000, 19840000, 20150000, 20800000, 24800000, 25792000, 32240000, 40300000, 41600000, 49600000, 51584000, 64480000, 80600000, 99200000, 128960000, 161200000, 257920000, 322400000, 644800000, 1289600000]

約数ペア:

[(1, 1289600000), (2, 644800000), (4, 322400000), (5, 257920000), (8, 161200000), (10, 128960000), (13, 99200000), (16, 80600000), (20, 64480000), (25, 51584000), (26, 49600000), (31, 41600000), (32, 40300000), (40, 32240000), (50, 25792000), (52, 24800000), (62, 20800000), (64, 20150000), (65, 19840000), (80, 16120000), (100, 12896000), (104, 12400000), (124, 10400000), (125, 10316800), (128, 10075000), (130, 9920000), (155, 8320000), (160, 8060000), (200, 6448000), (208, 6200000), (248, 5200000), (250, 5158400), (256, 5037500), (260, 4960000), (310, 4160000), (320, 4030000), (325, 3968000), (400, 3224000), (403, 3200000), (416, 3100000), (496, 2600000), (500, 2579200), (512, 2518750), (520, 2480000), (620, 2080000), (625, 2063360), (640, 2015000), (650, 1984000), (775, 1664000), (800, 1612000), (806, 1600000), (832, 1550000), (992, 1300000), (1000, 1289600), (1024, 1259375), (1040, 1240000), (1240, 1040000), (1250, 1031680), (1280, 1007500), (1300, 992000), (1550, 832000), (1600, 806000), (1612, 800000), (1625, 793600), (1664, 775000), (1984, 650000), (2000, 644800), (2015, 640000), (2080, 620000), (2480, 520000), (2500, 515840), (2560, 503750), (2600, 496000), (3100, 416000), (3125, 412672), (3200, 403000), (3224, 400000), (3250, 396800), (3328, 387500), (3875, 332800), (3968, 325000), (4000, 322400), (4030, 320000), (4160, 310000), (4960, 260000), (5000, 257920), (5120, 251875), (5200, 248000), (6200, 208000), (6250, 206336), (6400, 201500), (6448, 200000), (6500, 198400), (6656, 193750), (7750, 166400), (7936, 162500), (8000, 161200), (8060, 160000), (8125, 158720), (8320, 155000), (9920, 130000), (10000, 128960), (10075, 128000), (10400, 124000), (12400, 104000), (12500, 103168), (12800, 100750), (12896, 100000), (13000, 99200), (13312, 96875), (15500, 83200), (15872, 81250), (16000, 80600), (16120, 80000), (16250, 79360), (16640, 77500), (19375, 66560), (19840, 65000), (20000, 64480), (20150, 64000), (20800, 62000), (24800, 52000), (25000, 51584), (25600, 50375), (25792, 50000), (26000, 49600), (31000, 41600), (31744, 40625), (32000, 40300), (32240, 40000), (32500, 39680), (33280, 38750)]