18939823

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:247

約数の個数: 24

約数和(自身を含む): 23023440

約数和(自身を除く): 4083617

約数列:

[1, 7, 43, 49, 89, 101, 301, 623, 707, 2107, 3827, 4343, 4361, 4949, 8989, 26789, 30401, 62923, 187523, 212807, 386527, 440461, 2705689, 18939823]

約数ペア:

[(1, 18939823), (7, 2705689), (43, 440461), (49, 386527), (89, 212807), (101, 187523), (301, 62923), (623, 30401), (707, 26789), (2107, 8989), (3827, 4949), (4343, 4361)]