18490745

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{40639}}^1$

素因数の和:40664

約数の個数: 16

約数和(自身を含む): 27310080

約数和(自身を除く): 8819335

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 40639, 203195, 284473, 528307, 1422365, 2641535, 3698149, 18490745]

約数ペア:

[(1, 18490745), (5, 3698149), (7, 2641535), (13, 1422365), (35, 528307), (65, 284473), (91, 203195), (455, 40639)]