21137295

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{32771}}^1$

素因数の和:32822

約数の個数: 16

約数和(自身を含む): 34607232

約数和(自身を除く): 13469937

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 32771, 98313, 163855, 491565, 1409153, 4227459, 7045765, 21137295]

約数ペア:

[(1, 21137295), (3, 7045765), (5, 4227459), (15, 1409153), (43, 491565), (129, 163855), (215, 98313), (645, 32771)]