20391639

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{5009}}^1$

素因数の和:5094

約数の個数: 16

約数和(自身を含む): 28857600

約数和(自身を除く): 8465961

約数列:

[1, 3, 23, 59, 69, 177, 1357, 4071, 5009, 15027, 115207, 295531, 345621, 886593, 6797213, 20391639]

約数ペア:

[(1, 20391639), (3, 6797213), (23, 886593), (59, 345621), (69, 295531), (177, 115207), (1357, 15027), (4071, 5009)]