19806505

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{947}}^1$

素因数の和:1088

約数の個数: 16

約数和(自身を含む): 24572160

約数和(自身を除く): 4765655

約数列:

[1, 5, 47, 89, 235, 445, 947, 4183, 4735, 20915, 44509, 84283, 222545, 421415, 3961301, 19806505]

約数ペア:

[(1, 19806505), (5, 3961301), (47, 421415), (89, 222545), (235, 84283), (445, 44509), (947, 20915), (4183, 4735)]