18128785

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1\times {\mathrm{229}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 22256640

約数和(自身を除く): 4127855

約数列:

[1, 5, 71, 223, 229, 355, 1115, 1145, 15833, 16259, 51067, 79165, 81295, 255335, 3625757, 18128785]

約数ペア:

[(1, 18128785), (5, 3625757), (71, 255335), (223, 81295), (229, 79165), (355, 51067), (1115, 16259), (1145, 15833)]