21181112

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{919}}^1$

素因数の和:1035

約数の個数: 32

約数和(自身を含む): 41289600

約数和(自身を除く): 20108488

約数列:

[1, 2, 4, 8, 43, 67, 86, 134, 172, 268, 344, 536, 919, 1838, 2881, 3676, 5762, 7352, 11524, 23048, 39517, 61573, 79034, 123146, 158068, 246292, 316136, 492584, 2647639, 5295278, 10590556, 21181112]

約数ペア:

[(1, 21181112), (2, 10590556), (4, 5295278), (8, 2647639), (43, 492584), (67, 316136), (86, 246292), (134, 158068), (172, 123146), (268, 79034), (344, 61573), (536, 39517), (919, 23048), (1838, 11524), (2881, 7352), (3676, 5762)]