21891740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84199}}^1$

素因数の和:84221

約数の個数: 24

約数和(自身を含む): 49509600

約数和(自身を除く): 27617860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84199, 168398, 336796, 420995, 841990, 1094587, 1683980, 2189174, 4378348, 5472935, 10945870, 21891740]

約数ペア:

[(1, 21891740), (2, 10945870), (4, 5472935), (5, 4378348), (10, 2189174), (13, 1683980), (20, 1094587), (26, 841990), (52, 420995), (65, 336796), (130, 168398), (260, 84199)]