21490876

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{4481}}^1$

素因数の和:4605

約数の個数: 24

約数和(自身を含む): 41413680

約数和(自身を除く): 19922804

約数列:

[1, 2, 4, 11, 22, 44, 109, 218, 436, 1199, 2398, 4481, 4796, 8962, 17924, 49291, 98582, 197164, 488429, 976858, 1953716, 5372719, 10745438, 21490876]

約数ペア:

[(1, 21490876), (2, 10745438), (4, 5372719), (11, 1953716), (22, 976858), (44, 488429), (109, 197164), (218, 98582), (436, 49291), (1199, 17924), (2398, 8962), (4481, 4796)]