19975487

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{163}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 24342192

約数和(自身を除く): 4366705

約数列:

[1, 7, 41, 49, 61, 163, 287, 427, 1141, 2009, 2501, 2989, 6683, 7987, 9943, 17507, 46781, 69601, 122549, 327467, 407663, 487207, 2853641, 19975487]

約数ペア:

[(1, 19975487), (7, 2853641), (41, 487207), (49, 407663), (61, 327467), (163, 122549), (287, 69601), (427, 46781), (1141, 17507), (2009, 9943), (2501, 7987), (2989, 6683)]