21863620

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17921}}^1$

素因数の和:17991

約数の個数: 24

約数和(自身を含む): 46668888

約数和(自身を除く): 24805268

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17921, 35842, 71684, 89605, 179210, 358420, 1093181, 2186362, 4372724, 5465905, 10931810, 21863620]

約数ペア:

[(1, 21863620), (2, 10931810), (4, 5465905), (5, 4372724), (10, 2186362), (20, 1093181), (61, 358420), (122, 179210), (244, 89605), (305, 71684), (610, 35842), (1220, 17921)]