21351998

素因数分解:

$2^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1\times {\mathrm{523}}^1$

素因数の和:811

約数の個数: 16

約数和(自身を含む): 32540400

約数和(自身を除く): 11188402

約数列:

[1, 2, 137, 149, 274, 298, 523, 1046, 20413, 40826, 71651, 77927, 143302, 155854, 10675999, 21351998]

約数ペア:

[(1, 21351998), (2, 10675999), (137, 155854), (149, 143302), (274, 77927), (298, 71651), (523, 40826), (1046, 20413)]