21118715

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1\times {\mathrm{449}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 26568000

約数和(自身を除く): 5449285

約数列:

[1, 5, 23, 115, 409, 449, 2045, 2245, 9407, 10327, 47035, 51635, 183641, 918205, 4223743, 21118715]

約数ペア:

[(1, 21118715), (5, 4223743), (23, 918205), (115, 183641), (409, 51635), (449, 47035), (2045, 10327), (2245, 9407)]