81578920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{7057}}^1$

素因数の和:7102

約数の個数: 48

約数和(自身を含む): 195012540

約数和(自身を除く): 113433620

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 2312, 2890, 5780, 7057, 11560, 14114, 28228, 35285, 56456, 70570, 119969, 141140, 239938, 282280, 479876, 599845, 959752, 1199690, 2039473, 2399380, 4078946, 4798760, 8157892, 10197365, 16315784, 20394730, 40789460, 81578920]

約数ペア:

[(1, 81578920), (2, 40789460), (4, 20394730), (5, 16315784), (8, 10197365), (10, 8157892), (17, 4798760), (20, 4078946), (34, 2399380), (40, 2039473), (68, 1199690), (85, 959752), (136, 599845), (170, 479876), (289, 282280), (340, 239938), (578, 141140), (680, 119969), (1156, 70570), (1445, 56456), (2312, 35285), (2890, 28228), (5780, 14114), (7057, 11560)]