21355580

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{15937}}^1$

素因数の和:16013

約数の個数: 24

約数和(自身を含む): 45518928

約数和(自身を除く): 24163348

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 15937, 31874, 63748, 79685, 159370, 318740, 1067779, 2135558, 4271116, 5338895, 10677790, 21355580]

約数ペア:

[(1, 21355580), (2, 10677790), (4, 5338895), (5, 4271116), (10, 2135558), (20, 1067779), (67, 318740), (134, 159370), (268, 79685), (335, 63748), (670, 31874), (1340, 15937)]