64480000

素因数分解:

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

素因数の和:80

約数の個数: 180

約数和(自身を含む): 178792768

約数和(自身を除く): 114312768

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, 992, 1000, 1040, 1240, 1250, 1280, 1300, 1550, 1600, 1612, 1625, 1664, 1984, 2000, 2015, 2080, 2480, 2500, 2600, 3100, 3200, 3224, 3250, 3328, 3875, 3968, 4000, 4030, 4160, 4960, 5000, 5200, 6200, 6400, 6448, 6500, 7750, 7936, 8000, 8060, 8125, 8320, 9920, 10000, 10075, 10400, 12400, 12896, 13000, 15500, 16000, 16120, 16250, 16640, 19375, 19840, 20000, 20150, 20800, 24800, 25792, 26000, 31000, 32000, 32240, 32500, 38750, 39680, 40000, 40300, 41600, 49600, 50375, 51584, 52000, 62000, 64480, 65000, 77500, 80000, 80600, 83200, 99200, 100750, 103168, 104000, 124000, 128960, 130000, 155000, 160000, 161200, 198400, 201500, 208000, 248000, 251875, 257920, 260000, 310000, 322400, 403000, 416000, 496000, 503750, 515840, 520000, 620000, 644800, 806000, 992000, 1007500, 1040000, 1240000, 1289600, 1612000, 2015000, 2080000, 2480000, 2579200, 3224000, 4030000, 4960000, 6448000, 8060000, 12896000, 16120000, 32240000, 64480000]

約数ペア:

[(1, 64480000), (2, 32240000), (4, 16120000), (5, 12896000), (8, 8060000), (10, 6448000), (13, 4960000), (16, 4030000), (20, 3224000), (25, 2579200), (26, 2480000), (31, 2080000), (32, 2015000), (40, 1612000), (50, 1289600), (52, 1240000), (62, 1040000), (64, 1007500), (65, 992000), (80, 806000), (100, 644800), (104, 620000), (124, 520000), (125, 515840), (128, 503750), (130, 496000), (155, 416000), (160, 403000), (200, 322400), (208, 310000), (248, 260000), (250, 257920), (256, 251875), (260, 248000), (310, 208000), (320, 201500), (325, 198400), (400, 161200), (403, 160000), (416, 155000), (496, 130000), (500, 128960), (520, 124000), (620, 104000), (625, 103168), (640, 100750), (650, 99200), (775, 83200), (800, 80600), (806, 80000), (832, 77500), (992, 65000), (1000, 64480), (1040, 62000), (1240, 52000), (1250, 51584), (1280, 50375), (1300, 49600), (1550, 41600), (1600, 40300), (1612, 40000), (1625, 39680), (1664, 38750), (1984, 32500), (2000, 32240), (2015, 32000), (2080, 31000), (2480, 26000), (2500, 25792), (2600, 24800), (3100, 20800), (3200, 20150), (3224, 20000), (3250, 19840), (3328, 19375), (3875, 16640), (3968, 16250), (4000, 16120), (4030, 16000), (4160, 15500), (4960, 13000), (5000, 12896), (5200, 12400), (6200, 10400), (6400, 10075), (6448, 10000), (6500, 9920), (7750, 8320), (7936, 8125), (8000, 8060)]