21191240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75683}}^1$

素因数の和:75701

約数の個数: 32

約数和(自身を含む): 54492480

約数和(自身を除く): 33301240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75683, 151366, 302732, 378415, 529781, 605464, 756830, 1059562, 1513660, 2119124, 2648905, 3027320, 4238248, 5297810, 10595620, 21191240]

約数ペア:

[(1, 21191240), (2, 10595620), (4, 5297810), (5, 4238248), (7, 3027320), (8, 2648905), (10, 2119124), (14, 1513660), (20, 1059562), (28, 756830), (35, 605464), (40, 529781), (56, 378415), (70, 302732), (140, 151366), (280, 75683)]