21977615

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{977}}^1$

素因数の和:1402

約数の個数: 16

約数和(自身を含む): 28870560

約数和(自身を除く): 6892945

約数列:

[1, 5, 11, 55, 409, 977, 2045, 4499, 4885, 10747, 22495, 53735, 399593, 1997965, 4395523, 21977615]

約数ペア:

[(1, 21977615), (5, 4395523), (11, 1997965), (55, 399593), (409, 53735), (977, 22495), (2045, 10747), (4499, 4885)]