20428945

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1\times {\mathrm{443}}^1$

素因数の和:872

約数の個数: 16

約数和(自身を含む): 25702272

約数和(自身を除く): 5273327

約数列:

[1, 5, 23, 115, 401, 443, 2005, 2215, 9223, 10189, 46115, 50945, 177643, 888215, 4085789, 20428945]

約数ペア:

[(1, 20428945), (5, 4085789), (23, 888215), (115, 177643), (401, 50945), (443, 46115), (2005, 10189), (2215, 9223)]