16881431

素因数分解:

$7^4\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:196

約数の個数: 20

約数和(自身を含む): 20167200

約数和(自身を除く): 3285769

約数列:

[1, 7, 49, 79, 89, 343, 553, 623, 2401, 3871, 4361, 7031, 27097, 30527, 49217, 189679, 213689, 344519, 2411633, 16881431]

約数ペア:

[(1, 16881431), (7, 2411633), (49, 344519), (79, 213689), (89, 189679), (343, 49217), (553, 30527), (623, 27097), (2401, 7031), (3871, 4361)]