988890580

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{617}}^1\times {\mathrm{631}}^1$

素因数の和:1384

約数の個数: 48

約数和(自身を含む): 2099736576

約数和(自身を除く): 1110845996

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 617, 631, 635, 1234, 1262, 1270, 2468, 2524, 2540, 3085, 3155, 6170, 6310, 12340, 12620, 78359, 80137, 156718, 160274, 313436, 320548, 389327, 391795, 400685, 778654, 783590, 801370, 1557308, 1567180, 1602740, 1946635, 3893270, 7786540, 49444529, 98889058, 197778116, 247222645, 494445290, 988890580]

約数ペア:

[(1, 988890580), (2, 494445290), (4, 247222645), (5, 197778116), (10, 98889058), (20, 49444529), (127, 7786540), (254, 3893270), (508, 1946635), (617, 1602740), (631, 1567180), (635, 1557308), (1234, 801370), (1262, 783590), (1270, 778654), (2468, 400685), (2524, 391795), (2540, 389327), (3085, 320548), (3155, 313436), (6170, 160274), (6310, 156718), (12340, 80137), (12620, 78359)]