20304905

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{443}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 24935040

約数和(自身を除く): 4630135

約数列:

[1, 5, 89, 103, 443, 445, 515, 2215, 9167, 39427, 45629, 45835, 197135, 228145, 4060981, 20304905]

約数ペア:

[(1, 20304905), (5, 4060981), (89, 228145), (103, 197135), (443, 45835), (445, 45629), (515, 39427), (2215, 9167)]