21026140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1063}}^1$

素因数の和:1138

約数の個数: 48

約数和(自身を含む): 47190528

約数和(自身を除く): 26164388

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1063, 1978, 2126, 3956, 4252, 4945, 5315, 9890, 10630, 19780, 21260, 24449, 45709, 48898, 91418, 97796, 122245, 182836, 228545, 244490, 457090, 488980, 914180, 1051307, 2102614, 4205228, 5256535, 10513070, 21026140]

約数ペア:

[(1, 21026140), (2, 10513070), (4, 5256535), (5, 4205228), (10, 2102614), (20, 1051307), (23, 914180), (43, 488980), (46, 457090), (86, 244490), (92, 228545), (115, 182836), (172, 122245), (215, 97796), (230, 91418), (430, 48898), (460, 45709), (860, 24449), (989, 21260), (1063, 19780), (1978, 10630), (2126, 9890), (3956, 5315), (4252, 4945)]