21781697

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{1759}}^1$

素因数の和:1856

約数の個数: 16

約数和(自身を含む): 26188800

約数和(自身を除く): 4407103

約数列:

[1, 7, 29, 61, 203, 427, 1759, 1769, 12313, 12383, 51011, 107299, 357077, 751093, 3111671, 21781697]

約数ペア:

[(1, 21781697), (7, 3111671), (29, 751093), (61, 357077), (203, 107299), (427, 51011), (1759, 12383), (1769, 12313)]