21090628

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^2\times {\mathrm{109}}^1$

素因数の和:248

約数の個数: 36

約数和(自身を含む): 40780740

約数和(自身を除く): 19690112

約数列:

[1, 2, 4, 13, 26, 52, 61, 109, 122, 218, 244, 436, 793, 1417, 1586, 2834, 3172, 3721, 5668, 6649, 7442, 13298, 14884, 26596, 48373, 86437, 96746, 172874, 193492, 345748, 405589, 811178, 1622356, 5272657, 10545314, 21090628]

約数ペア:

[(1, 21090628), (2, 10545314), (4, 5272657), (13, 1622356), (26, 811178), (52, 405589), (61, 345748), (109, 193492), (122, 172874), (218, 96746), (244, 86437), (436, 48373), (793, 26596), (1417, 14884), (1586, 13298), (2834, 7442), (3172, 6649), (3721, 5668)]