21247780

素因数分解:

$2^2\times 5^1\times {\mathrm{941}}^1\times {\mathrm{1129}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 44707320

約数和(自身を除く): 23459540

約数列:

[1, 2, 4, 5, 10, 20, 941, 1129, 1882, 2258, 3764, 4516, 4705, 5645, 9410, 11290, 18820, 22580, 1062389, 2124778, 4249556, 5311945, 10623890, 21247780]

約数ペア:

[(1, 21247780), (2, 10623890), (4, 5311945), (5, 4249556), (10, 2124778), (20, 1062389), (941, 22580), (1129, 18820), (1882, 11290), (2258, 9410), (3764, 5645), (4516, 4705)]