20482540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78779}}^1$

素因数の和:78801

約数の個数: 24

約数和(自身を含む): 46322640

約数和(自身を除く): 25840100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78779, 157558, 315116, 393895, 787790, 1024127, 1575580, 2048254, 4096508, 5120635, 10241270, 20482540]

約数ペア:

[(1, 20482540), (2, 10241270), (4, 5120635), (5, 4096508), (10, 2048254), (13, 1575580), (20, 1024127), (26, 787790), (52, 393895), (65, 315116), (130, 157558), (260, 78779)]