21019778

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{7417}}^1$

素因数の和:7541

約数の個数: 16

約数和(自身を含む): 34271160

約数和(自身を除く): 13251382

約数列:

[1, 2, 13, 26, 109, 218, 1417, 2834, 7417, 14834, 96421, 192842, 808453, 1616906, 10509889, 21019778]

約数ペア:

[(1, 21019778), (2, 10509889), (13, 1616906), (26, 808453), (109, 192842), (218, 96421), (1417, 14834), (2834, 7417)]