21387208

素因数分解:

$2^3\times {\mathrm{251}}^1\times {\mathrm{10651}}^1$

素因数の和:10908

約数の個数: 16

約数和(自身を含む): 40264560

約数和(自身を除く): 18877352

約数列:

[1, 2, 4, 8, 251, 502, 1004, 2008, 10651, 21302, 42604, 85208, 2673401, 5346802, 10693604, 21387208]

約数ペア:

[(1, 21387208), (2, 10693604), (4, 5346802), (8, 2673401), (251, 85208), (502, 42604), (1004, 21302), (2008, 10651)]