28358780

素因数分解:

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

素因数の和:350

約数の個数: 36

約数和(自身を含む): 60581640

約数和(自身を除く): 32222860

約数列:

[1, 2, 4, 5, 10, 20, 101, 139, 202, 278, 404, 505, 556, 695, 1010, 1390, 2020, 2780, 10201, 14039, 20402, 28078, 40804, 51005, 56156, 70195, 102010, 140390, 204020, 280780, 1417939, 2835878, 5671756, 7089695, 14179390, 28358780]

約数ペア:

[(1, 28358780), (2, 14179390), (4, 7089695), (5, 5671756), (10, 2835878), (20, 1417939), (101, 280780), (139, 204020), (202, 140390), (278, 102010), (404, 70195), (505, 56156), (556, 51005), (695, 40804), (1010, 28078), (1390, 20402), (2020, 14039), (2780, 10201)]