20199845

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{643}}^1$

素因数の和:812

約数の個数: 16

約数和(自身を含む): 24915072

約数和(自身を除く): 4715227

約数列:

[1, 5, 61, 103, 305, 515, 643, 3215, 6283, 31415, 39223, 66229, 196115, 331145, 4039969, 20199845]

約数ペア:

[(1, 20199845), (5, 4039969), (61, 331145), (103, 196115), (305, 66229), (515, 39223), (643, 31415), (3215, 6283)]