18899905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{1103}}^1$

素因数の和:1280

約数の個数: 16

約数和(自身を含む): 23846400

約数和(自身を除く): 4946495

約数列:

[1, 5, 23, 115, 149, 745, 1103, 3427, 5515, 17135, 25369, 126845, 164347, 821735, 3779981, 18899905]

約数ペア:

[(1, 18899905), (5, 3779981), (23, 821735), (115, 164347), (149, 126845), (745, 25369), (1103, 17135), (3427, 5515)]