20878156

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{1213}}^1$

素因数の和:1561

約数の個数: 24

約数和(自身を含む): 39498704

約数和(自身を除く): 18620548

約数列:

[1, 2, 4, 13, 26, 52, 331, 662, 1213, 1324, 2426, 4303, 4852, 8606, 15769, 17212, 31538, 63076, 401503, 803006, 1606012, 5219539, 10439078, 20878156]

約数ペア:

[(1, 20878156), (2, 10439078), (4, 5219539), (13, 1606012), (26, 803006), (52, 401503), (331, 63076), (662, 31538), (1213, 17212), (1324, 15769), (2426, 8606), (4303, 4852)]