8421721

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 10818752

約数和(自身を除く): 2397031

約数列:

[1, 7, 11, 61, 77, 121, 163, 427, 671, 847, 1141, 1793, 4697, 7381, 9943, 12551, 19723, 51667, 69601, 109373, 138061, 765611, 1203103, 8421721]

約数ペア:

[(1, 8421721), (7, 1203103), (11, 765611), (61, 138061), (77, 109373), (121, 69601), (163, 51667), (427, 19723), (671, 12551), (847, 9943), (1141, 7381), (1793, 4697)]