21402020

素因数分解:

$2^2\times 5^1\times {\mathrm{587}}^1\times {\mathrm{1823}}^1$

素因数の和:2419

約数の個数: 24

約数和(自身を含む): 45045504

約数和(自身を除く): 23643484

約数列:

[1, 2, 4, 5, 10, 20, 587, 1174, 1823, 2348, 2935, 3646, 5870, 7292, 9115, 11740, 18230, 36460, 1070101, 2140202, 4280404, 5350505, 10701010, 21402020]

約数ペア:

[(1, 21402020), (2, 10701010), (4, 5350505), (5, 4280404), (10, 2140202), (20, 1070101), (587, 36460), (1174, 18230), (1823, 11740), (2348, 9115), (2935, 7292), (3646, 5870)]