18780995

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{829}}^1$

素因数の和:1054

約数の個数: 16

約数和(自身を含む): 23664960

約数和(自身を除く): 4883965

約数列:

[1, 5, 23, 115, 197, 829, 985, 4145, 4531, 19067, 22655, 95335, 163313, 816565, 3756199, 18780995]

約数ペア:

[(1, 18780995), (5, 3756199), (23, 816565), (115, 163313), (197, 95335), (829, 22655), (985, 19067), (4145, 4531)]