21657015

素因数分解:

$3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4259}}^1$

素因数の和:4383

約数の個数: 24

約数和(自身を含む): 37879920

約数和(自身を除く): 16222905

約数列:

[1, 3, 5, 9, 15, 45, 113, 339, 565, 1017, 1695, 4259, 5085, 12777, 21295, 38331, 63885, 191655, 481267, 1443801, 2406335, 4331403, 7219005, 21657015]

約数ペア:

[(1, 21657015), (3, 7219005), (5, 4331403), (9, 2406335), (15, 1443801), (45, 481267), (113, 191655), (339, 63885), (565, 38331), (1017, 21295), (1695, 12777), (4259, 5085)]