64731620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78941}}^1$

素因数の和:78991

約数の個数: 24

約数和(自身を含む): 139253688

約数和(自身を除く): 74522068

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 78941, 157882, 315764, 394705, 789410, 1578820, 3236581, 6473162, 12946324, 16182905, 32365810, 64731620]

約数ペア:

[(1, 64731620), (2, 32365810), (4, 16182905), (5, 12946324), (10, 6473162), (20, 3236581), (41, 1578820), (82, 789410), (164, 394705), (205, 315764), (410, 157882), (820, 78941)]