21155564

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{223}}^1\times {\mathrm{641}}^1$

素因数の和:905

約数の個数: 24

約数和(自身を含む): 38252928

約数和(自身を除く): 17097364

約数列:

[1, 2, 4, 37, 74, 148, 223, 446, 641, 892, 1282, 2564, 8251, 16502, 23717, 33004, 47434, 94868, 142943, 285886, 571772, 5288891, 10577782, 21155564]

約数ペア:

[(1, 21155564), (2, 10577782), (4, 5288891), (37, 571772), (74, 285886), (148, 142943), (223, 94868), (446, 47434), (641, 33004), (892, 23717), (1282, 16502), (2564, 8251)]