21703820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25237}}^1$

素因数の和:25289

約数の個数: 24

約数和(自身を含む): 46639824

約数和(自身を除く): 24936004

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25237, 50474, 100948, 126185, 252370, 504740, 1085191, 2170382, 4340764, 5425955, 10851910, 21703820]

約数ペア:

[(1, 21703820), (2, 10851910), (4, 5425955), (5, 4340764), (10, 2170382), (20, 1085191), (43, 504740), (86, 252370), (172, 126185), (215, 100948), (430, 50474), (860, 25237)]