64870000

素因数分解:

$2^4\times 5^4\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:540

約数の個数: 100

約数和(自身を含む): 169477000

約数和(自身を除く): 104607000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 125, 130, 200, 208, 250, 260, 325, 400, 499, 500, 520, 625, 650, 998, 1000, 1040, 1250, 1300, 1625, 1996, 2000, 2495, 2500, 2600, 3250, 3992, 4990, 5000, 5200, 6487, 6500, 7984, 8125, 9980, 10000, 12475, 12974, 13000, 16250, 19960, 24950, 25948, 26000, 32435, 32500, 39920, 49900, 51896, 62375, 64870, 65000, 99800, 103792, 124750, 129740, 130000, 162175, 199600, 249500, 259480, 311875, 324350, 499000, 518960, 623750, 648700, 810875, 998000, 1247500, 1297400, 1621750, 2495000, 2594800, 3243500, 4054375, 4990000, 6487000, 8108750, 12974000, 16217500, 32435000, 64870000]

約数ペア:

[(1, 64870000), (2, 32435000), (4, 16217500), (5, 12974000), (8, 8108750), (10, 6487000), (13, 4990000), (16, 4054375), (20, 3243500), (25, 2594800), (26, 2495000), (40, 1621750), (50, 1297400), (52, 1247500), (65, 998000), (80, 810875), (100, 648700), (104, 623750), (125, 518960), (130, 499000), (200, 324350), (208, 311875), (250, 259480), (260, 249500), (325, 199600), (400, 162175), (499, 130000), (500, 129740), (520, 124750), (625, 103792), (650, 99800), (998, 65000), (1000, 64870), (1040, 62375), (1250, 51896), (1300, 49900), (1625, 39920), (1996, 32500), (2000, 32435), (2495, 26000), (2500, 25948), (2600, 24950), (3250, 19960), (3992, 16250), (4990, 13000), (5000, 12974), (5200, 12475), (6487, 10000), (6500, 9980), (7984, 8125)]