18966740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72949}}^1$

素因数の和:72971

約数の個数: 24

約数和(自身を含む): 42894600

約数和(自身を除く): 23927860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72949, 145898, 291796, 364745, 729490, 948337, 1458980, 1896674, 3793348, 4741685, 9483370, 18966740]

約数ペア:

[(1, 18966740), (2, 9483370), (4, 4741685), (5, 3793348), (10, 1896674), (13, 1458980), (20, 948337), (26, 729490), (52, 364745), (65, 291796), (130, 145898), (260, 72949)]