21170420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13399}}^1$

素因数の和:13487

約数の個数: 24

約数和(自身を含む): 45024000

約数和(自身を除く): 23853580

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13399, 26798, 53596, 66995, 133990, 267980, 1058521, 2117042, 4234084, 5292605, 10585210, 21170420]

約数ペア:

[(1, 21170420), (2, 10585210), (4, 5292605), (5, 4234084), (10, 2117042), (20, 1058521), (79, 267980), (158, 133990), (316, 66995), (395, 53596), (790, 26798), (1580, 13399)]