280780

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 599760

約数和(自身を除く): 318980

約数列:

[1, 2, 4, 5, 10, 20, 101, 139, 202, 278, 404, 505, 556, 695, 1010, 1390, 2020, 2780, 14039, 28078, 56156, 70195, 140390, 280780]

約数ペア:

[(1, 280780), (2, 140390), (4, 70195), (5, 56156), (10, 28078), (20, 14039), (101, 2780), (139, 2020), (202, 1390), (278, 1010), (404, 695), (505, 556)]