20456165

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{1987}}^1$

素因数の和:2092

約数の個数: 16

約数和(自身を含む): 25764480

約数和(自身を除く): 5308315

約数列:

[1, 5, 29, 71, 145, 355, 1987, 2059, 9935, 10295, 57623, 141077, 288115, 705385, 4091233, 20456165]

約数ペア:

[(1, 20456165), (5, 4091233), (29, 705385), (71, 288115), (145, 141077), (355, 57623), (1987, 10295), (2059, 9935)]