21579640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6829}}^1$

素因数の和:6919

約数の個数: 32

約数和(自身を含む): 49176000

約数和(自身を除く): 27596360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6829, 13658, 27316, 34145, 54632, 68290, 136580, 273160, 539491, 1078982, 2157964, 2697455, 4315928, 5394910, 10789820, 21579640]

約数ペア:

[(1, 21579640), (2, 10789820), (4, 5394910), (5, 4315928), (8, 2697455), (10, 2157964), (20, 1078982), (40, 539491), (79, 273160), (158, 136580), (316, 68290), (395, 54632), (632, 34145), (790, 27316), (1580, 13658), (3160, 6829)]