20953480

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2087}}^1$

素因数の和:2349

約数の個数: 32

約数和(自身を含む): 47355840

約数和(自身を除く): 26402360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2087, 2510, 4174, 5020, 8348, 10040, 10435, 16696, 20870, 41740, 83480, 523837, 1047674, 2095348, 2619185, 4190696, 5238370, 10476740, 20953480]

約数ペア:

[(1, 20953480), (2, 10476740), (4, 5238370), (5, 4190696), (8, 2619185), (10, 2095348), (20, 1047674), (40, 523837), (251, 83480), (502, 41740), (1004, 20870), (1255, 16696), (2008, 10435), (2087, 10040), (2510, 8348), (4174, 5020)]