21571613

素因数分解:

$7^3\times {\mathrm{61}}^1\times {\mathrm{1031}}^1$

素因数の和:1113

約数の個数: 16

約数和(自身を含む): 25593600

約数和(自身を除く): 4021987

約数列:

[1, 7, 49, 61, 343, 427, 1031, 2989, 7217, 20923, 50519, 62891, 353633, 440237, 3081659, 21571613]

約数ペア:

[(1, 21571613), (7, 3081659), (49, 440237), (61, 353633), (343, 62891), (427, 50519), (1031, 20923), (2989, 7217)]