19999765

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{2851}}^1$

素因数の和:2940

約数の個数: 16

約数和(自身を含む): 25462656

約数和(自身を除く): 5462891

約数列:

[1, 5, 23, 61, 115, 305, 1403, 2851, 7015, 14255, 65573, 173911, 327865, 869555, 3999953, 19999765]

約数ペア:

[(1, 19999765), (5, 3999953), (23, 869555), (61, 327865), (115, 173911), (305, 65573), (1403, 14255), (2851, 7015)]