20398172

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{1123}}^1$

素因数の和:1385

約数の個数: 24

約数和(自身を含む): 37766400

約数和(自身を除く): 17368228

約数列:

[1, 2, 4, 19, 38, 76, 239, 478, 956, 1123, 2246, 4492, 4541, 9082, 18164, 21337, 42674, 85348, 268397, 536794, 1073588, 5099543, 10199086, 20398172]

約数ペア:

[(1, 20398172), (2, 10199086), (4, 5099543), (19, 1073588), (38, 536794), (76, 268397), (239, 85348), (478, 42674), (956, 21337), (1123, 18164), (2246, 9082), (4492, 4541)]