21321716

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31541}}^1$

素因数の和:31571

約数の個数: 18

約数和(自身を含む): 40405302

約数和(自身を除く): 19083586

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31541, 63082, 126164, 410033, 820066, 1640132, 5330429, 10660858, 21321716]

約数ペア:

[(1, 21321716), (2, 10660858), (4, 5330429), (13, 1640132), (26, 820066), (52, 410033), (169, 126164), (338, 63082), (676, 31541)]