399243579

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{7237}}^1$

素因数の和:7355

約数の個数: 32

約数和(自身を含む): 633701376

約数和(自身を除く): 234457797

約数列:

[1, 3, 7, 21, 37, 71, 111, 213, 259, 497, 777, 1491, 2627, 7237, 7881, 18389, 21711, 50659, 55167, 151977, 267769, 513827, 803307, 1541481, 1874383, 3596789, 5623149, 10790367, 19011599, 57034797, 133081193, 399243579]

約数ペア:

[(1, 399243579), (3, 133081193), (7, 57034797), (21, 19011599), (37, 10790367), (71, 5623149), (111, 3596789), (213, 1874383), (259, 1541481), (497, 803307), (777, 513827), (1491, 267769), (2627, 151977), (7237, 55167), (7881, 50659), (18389, 21711)]