20991632

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{5227}}^1$

素因数の和:5486

約数の個数: 20

約数和(自身を含む): 40841136

約数和(自身を除く): 19849504

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 5227, 10454, 20908, 41816, 83632, 1311977, 2623954, 5247908, 10495816, 20991632]

約数ペア:

[(1, 20991632), (2, 10495816), (4, 5247908), (8, 2623954), (16, 1311977), (251, 83632), (502, 41816), (1004, 20908), (2008, 10454), (4016, 5227)]