21920305

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{3527}}^1$

素因数の和:3656

約数の個数: 16

約数和(自身を含む): 28957824

約数和(自身を除く): 7037519

約数列:

[1, 5, 11, 55, 113, 565, 1243, 3527, 6215, 17635, 38797, 193985, 398551, 1992755, 4384061, 21920305]

約数ペア:

[(1, 21920305), (5, 4384061), (11, 1992755), (55, 398551), (113, 193985), (565, 38797), (1243, 17635), (3527, 6215)]