21106490

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{997}}^1$

素因数の和:1106

約数の個数: 32

約数和(自身を含む): 39880080

約数和(自身を除く): 18773590

約数列:

[1, 2, 5, 10, 29, 58, 73, 145, 146, 290, 365, 730, 997, 1994, 2117, 4234, 4985, 9970, 10585, 21170, 28913, 57826, 72781, 144565, 145562, 289130, 363905, 727810, 2110649, 4221298, 10553245, 21106490]

約数ペア:

[(1, 21106490), (2, 10553245), (5, 4221298), (10, 2110649), (29, 727810), (58, 363905), (73, 289130), (145, 145562), (146, 144565), (290, 72781), (365, 57826), (730, 28913), (997, 21170), (1994, 10585), (2117, 9970), (4234, 4985)]