21265540

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{2467}}^1$

素因数の和:2907

約数の個数: 24

約数和(自身を含む): 44779392

約数和(自身を除く): 23513852

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 2467, 4310, 4934, 8620, 9868, 12335, 24670, 49340, 1063277, 2126554, 4253108, 5316385, 10632770, 21265540]

約数ペア:

[(1, 21265540), (2, 10632770), (4, 5316385), (5, 4253108), (10, 2126554), (20, 1063277), (431, 49340), (862, 24670), (1724, 12335), (2155, 9868), (2467, 8620), (4310, 4934)]