18720247

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{12101}}^1$

素因数の和:12138

約数の個数: 16

約数和(自身を含む): 24397632

約数和(自身を除く): 5677385

約数列:

[1, 7, 13, 17, 91, 119, 221, 1547, 12101, 84707, 157313, 205717, 1101191, 1440019, 2674321, 18720247]

約数ペア:

[(1, 18720247), (7, 2674321), (13, 1440019), (17, 1101191), (91, 205717), (119, 157313), (221, 84707), (1547, 12101)]