31157880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19973}}^1$

素因数の和:20000

約数の個数: 64

約数和(自身を含む): 100668960

約数和(自身を除く): 69511080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 19973, 39946, 59919, 79892, 99865, 119838, 159784, 199730, 239676, 259649, 299595, 399460, 479352, 519298, 599190, 778947, 798920, 1038596, 1198380, 1298245, 1557894, 2077192, 2396760, 2596490, 3115788, 3894735, 5192980, 6231576, 7789470, 10385960, 15578940, 31157880]

約数ペア:

[(1, 31157880), (2, 15578940), (3, 10385960), (4, 7789470), (5, 6231576), (6, 5192980), (8, 3894735), (10, 3115788), (12, 2596490), (13, 2396760), (15, 2077192), (20, 1557894), (24, 1298245), (26, 1198380), (30, 1038596), (39, 798920), (40, 778947), (52, 599190), (60, 519298), (65, 479352), (78, 399460), (104, 299595), (120, 259649), (130, 239676), (156, 199730), (195, 159784), (260, 119838), (312, 99865), (390, 79892), (520, 59919), (780, 39946), (1560, 19973)]