21997508

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{3881}}^1$

素因数の和:4007

約数の個数: 24

約数和(自身を含む): 41847960

約数和(自身を除く): 19850452

約数列:

[1, 2, 4, 13, 26, 52, 109, 218, 436, 1417, 2834, 3881, 5668, 7762, 15524, 50453, 100906, 201812, 423029, 846058, 1692116, 5499377, 10998754, 21997508]

約数ペア:

[(1, 21997508), (2, 10998754), (4, 5499377), (13, 1692116), (26, 846058), (52, 423029), (109, 201812), (218, 100906), (436, 50453), (1417, 15524), (2834, 7762), (3881, 5668)]