19785799

素因数分解:

${\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{1619}}^1$

素因数の和:1742

約数の個数: 12

約数和(自身を含む): 21976920

約数和(自身を除く): 2191121

約数列:

[1, 11, 101, 121, 1111, 1619, 12221, 17809, 163519, 195899, 1798709, 19785799]

約数ペア:

[(1, 19785799), (11, 1798709), (101, 195899), (121, 163519), (1111, 17809), (1619, 12221)]