19889545

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{1949}}^1$

素因数の和:2124

約数の個数: 16

約数和(自身を含む): 25880400

約数和(自身を除く): 5990855

約数列:

[1, 5, 13, 65, 157, 785, 1949, 2041, 9745, 10205, 25337, 126685, 305993, 1529965, 3977909, 19889545]

約数ペア:

[(1, 19889545), (5, 3977909), (13, 1529965), (65, 305993), (157, 126685), (785, 25337), (1949, 10205), (2041, 9745)]