20215980

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{12479}}^1$

素因数の和:12500

約数の個数: 60

約数和(自身を含む): 63423360

約数和(自身を除く): 43207380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 12479, 24958, 37437, 49916, 62395, 74874, 112311, 124790, 149748, 187185, 224622, 249580, 336933, 374370, 449244, 561555, 673866, 748740, 1010799, 1123110, 1347732, 1684665, 2021598, 2246220, 3369330, 4043196, 5053995, 6738660, 10107990, 20215980]

約数ペア:

[(1, 20215980), (2, 10107990), (3, 6738660), (4, 5053995), (5, 4043196), (6, 3369330), (9, 2246220), (10, 2021598), (12, 1684665), (15, 1347732), (18, 1123110), (20, 1010799), (27, 748740), (30, 673866), (36, 561555), (45, 449244), (54, 374370), (60, 336933), (81, 249580), (90, 224622), (108, 187185), (135, 149748), (162, 124790), (180, 112311), (270, 74874), (324, 62395), (405, 49916), (540, 37437), (810, 24958), (1620, 12479)]