21917819

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{113}}^1\times {\mathrm{229}}^1$

素因数の和:371

約数の個数: 24

約数和(自身を含む): 27898080

約数和(自身を除く): 5980261

約数列:

[1, 7, 11, 77, 113, 121, 229, 791, 847, 1243, 1603, 2519, 8701, 13673, 17633, 25877, 27709, 95711, 181139, 193963, 284647, 1992529, 3131117, 21917819]

約数ペア:

[(1, 21917819), (7, 3131117), (11, 1992529), (77, 284647), (113, 193963), (121, 181139), (229, 95711), (791, 27709), (847, 25877), (1243, 17633), (1603, 13673), (2519, 8701)]