20744689

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{233}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 25608960

約数和(自身を除く): 4864271

約数列:

[1, 7, 23, 49, 79, 161, 233, 553, 1127, 1631, 1817, 3871, 5359, 11417, 12719, 18407, 37513, 89033, 128849, 262591, 423361, 901943, 2963527, 20744689]

約数ペア:

[(1, 20744689), (7, 2963527), (23, 901943), (49, 423361), (79, 262591), (161, 128849), (233, 89033), (553, 37513), (1127, 18407), (1631, 12719), (1817, 11417), (3871, 5359)]