18899919

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:348

約数の個数: 32

約数和(自身を含む): 29173760

約数和(自身を除く): 10273841

約数列:

[1, 3, 9, 27, 43, 73, 129, 219, 223, 387, 657, 669, 1161, 1971, 2007, 3139, 6021, 9417, 9589, 16279, 28251, 28767, 48837, 84753, 86301, 146511, 258903, 439533, 699997, 2099991, 6299973, 18899919]

約数ペア:

[(1, 18899919), (3, 6299973), (9, 2099991), (27, 699997), (43, 439533), (73, 258903), (129, 146511), (219, 86301), (223, 84753), (387, 48837), (657, 28767), (669, 28251), (1161, 16279), (1971, 9589), (2007, 9417), (3139, 6021)]