21217928

素因数分解:

$2^3\times {\mathrm{443}}^1\times {\mathrm{5987}}^1$

素因数の和:6436

約数の個数: 16

約数和(自身を含む): 39880080

約数和(自身を除く): 18662152

約数列:

[1, 2, 4, 8, 443, 886, 1772, 3544, 5987, 11974, 23948, 47896, 2652241, 5304482, 10608964, 21217928]

約数ペア:

[(1, 21217928), (2, 10608964), (4, 5304482), (8, 2652241), (443, 47896), (886, 23948), (1772, 11974), (3544, 5987)]