20353580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78283}}^1$

素因数の和:78305

約数の個数: 24

約数和(自身を含む): 46030992

約数和(自身を除く): 25677412

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78283, 156566, 313132, 391415, 782830, 1017679, 1565660, 2035358, 4070716, 5088395, 10176790, 20353580]

約数ペア:

[(1, 20353580), (2, 10176790), (4, 5088395), (5, 4070716), (10, 2035358), (13, 1565660), (20, 1017679), (26, 782830), (52, 391415), (65, 313132), (130, 156566), (260, 78283)]