18659221

素因数分解:

$7^1\times {\mathrm{127}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:424

約数の個数: 16

約数和(自身を含む): 21790720

約数和(自身を除く): 3131499

約数列:

[1, 7, 127, 139, 151, 889, 973, 1057, 17653, 19177, 20989, 123571, 134239, 146923, 2665603, 18659221]

約数ペア:

[(1, 18659221), (7, 2665603), (127, 146923), (139, 134239), (151, 123571), (889, 20989), (973, 19177), (1057, 17653)]