20778545

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{281}}^1\times {\mathrm{643}}^1$

素因数の和:952

約数の個数: 16

約数和(自身を含む): 26151552

約数和(自身を除く): 5373007

約数列:

[1, 5, 23, 115, 281, 643, 1405, 3215, 6463, 14789, 32315, 73945, 180683, 903415, 4155709, 20778545]

約数ペア:

[(1, 20778545), (5, 4155709), (23, 903415), (115, 180683), (281, 73945), (643, 32315), (1405, 14789), (3215, 6463)]