21090940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81119}}^1$

素因数の和:81141

約数の個数: 24

約数和(自身を含む): 47698560

約数和(自身を除く): 26607620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81119, 162238, 324476, 405595, 811190, 1054547, 1622380, 2109094, 4218188, 5272735, 10545470, 21090940]

約数ペア:

[(1, 21090940), (2, 10545470), (4, 5272735), (5, 4218188), (10, 2109094), (13, 1622380), (20, 1054547), (26, 811190), (52, 405595), (65, 324476), (130, 162238), (260, 81119)]