21977740

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1709}}^1$

素因数の和:2361

約数の個数: 24

約数和(自身を含む): 46252080

約数和(自身を除く): 24274340

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1709, 2572, 3215, 3418, 6430, 6836, 8545, 12860, 17090, 34180, 1098887, 2197774, 4395548, 5494435, 10988870, 21977740]

約数ペア:

[(1, 21977740), (2, 10988870), (4, 5494435), (5, 4395548), (10, 2197774), (20, 1098887), (643, 34180), (1286, 17090), (1709, 12860), (2572, 8545), (3215, 6836), (3418, 6430)]