21277991

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1\times {\mathrm{317}}^1$

素因数の和:590

約数の個数: 16

約数和(自身を含む): 25073664

約数和(自身を除く): 3795673

約数列:

[1, 7, 43, 223, 301, 317, 1561, 2219, 9589, 13631, 67123, 70691, 95417, 494837, 3039713, 21277991]

約数ペア:

[(1, 21277991), (7, 3039713), (43, 494837), (223, 95417), (301, 70691), (317, 67123), (1561, 13631), (2219, 9589)]