21851053

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1\times {\mathrm{353}}^1$

素因数の和:636

約数の個数: 16

約数和(自身を含む): 25827840

約数和(自身を除く): 3976787

約数列:

[1, 7, 37, 239, 259, 353, 1673, 2471, 8843, 13061, 61901, 84367, 91427, 590569, 3121579, 21851053]

約数ペア:

[(1, 21851053), (7, 3121579), (37, 590569), (239, 91427), (259, 84367), (353, 61901), (1673, 13061), (2471, 8843)]