18945857

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1\times {\mathrm{229}}^1$

素因数の和:512

約数の個数: 16

約数和(自身を含む): 22256640

約数和(自身を除く): 3310783

約数列:

[1, 7, 53, 223, 229, 371, 1561, 1603, 11819, 12137, 51067, 82733, 84959, 357469, 2706551, 18945857]

約数ペア:

[(1, 18945857), (7, 2706551), (53, 357469), (223, 84959), (229, 82733), (371, 51067), (1561, 12137), (1603, 11819)]