21820715

素因数分解:

$5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{2203}}^1$

素因数の和:2498

約数の個数: 16

約数和(自身を含む): 30044928

約数和(自身を除く): 8224213

約数列:

[1, 5, 7, 35, 283, 1415, 1981, 2203, 9905, 11015, 15421, 77105, 623449, 3117245, 4364143, 21820715]

約数ペア:

[(1, 21820715), (5, 4364143), (7, 3117245), (35, 623449), (283, 77105), (1415, 15421), (1981, 11015), (2203, 9905)]