21117968

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69467}}^1$

素因数の和:69494

約数の個数: 20

約数和(自身を含む): 43070160

約数和(自身を除く): 21952192

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69467, 138934, 277868, 555736, 1111472, 1319873, 2639746, 5279492, 10558984, 21117968]

約数ペア:

[(1, 21117968), (2, 10558984), (4, 5279492), (8, 2639746), (16, 1319873), (19, 1111472), (38, 555736), (76, 277868), (152, 138934), (304, 69467)]