18921965

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{1103}}^1$

素因数の和:1228

約数の個数: 16

約数和(自身を含む): 23528448

約数和(自身を除く): 4606483

約数列:

[1, 5, 47, 73, 235, 365, 1103, 3431, 5515, 17155, 51841, 80519, 259205, 402595, 3784393, 18921965]

約数ペア:

[(1, 18921965), (5, 3784393), (47, 402595), (73, 259205), (235, 80519), (365, 51841), (1103, 17155), (3431, 5515)]