18921212

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{149}}^1\times {\mathrm{599}}^1$

素因数の和:805

約数の個数: 24

約数和(自身を含む): 34020000

約数和(自身を除く): 15098788

約数列:

[1, 2, 4, 53, 106, 149, 212, 298, 596, 599, 1198, 2396, 7897, 15794, 31588, 31747, 63494, 89251, 126988, 178502, 357004, 4730303, 9460606, 18921212]

約数ペア:

[(1, 18921212), (2, 9460606), (4, 4730303), (53, 357004), (106, 178502), (149, 126988), (212, 89251), (298, 63494), (596, 31747), (599, 31588), (1198, 15794), (2396, 7897)]