20978111

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{2411}}^1$

素因数の和:2542

約数の個数: 16

約数和(自身を含む): 26396928

約数和(自身を除く): 5418817

約数列:

[1, 7, 11, 77, 113, 791, 1243, 2411, 8701, 16877, 26521, 185647, 272443, 1907101, 2996873, 20978111]

約数ペア:

[(1, 20978111), (7, 2996873), (11, 1907101), (77, 272443), (113, 185647), (791, 26521), (1243, 16877), (2411, 8701)]