28378259

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{2861}}^1$

素因数の和:2990

約数の個数: 16

約数和(自身を含む): 35259840

約数和(自身を除く): 6881581

約数列:

[1, 7, 13, 91, 109, 763, 1417, 2861, 9919, 20027, 37193, 260351, 311849, 2182943, 4054037, 28378259]

約数ペア:

[(1, 28378259), (7, 4054037), (13, 2182943), (91, 311849), (109, 260351), (763, 37193), (1417, 20027), (2861, 9919)]