21047115

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10711}}^1$

素因数の和:10850

約数の個数: 16

約数和(自身を含む): 33935616

約数和(自身を除く): 12888501

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10711, 32133, 53555, 160665, 1403141, 4209423, 7015705, 21047115]

約数ペア:

[(1, 21047115), (3, 7015705), (5, 4209423), (15, 1403141), (131, 160665), (393, 53555), (655, 32133), (1965, 10711)]