18720709

素因数分解:

$7^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{349}}^1$

素因数の和:532

約数の個数: 16

約数和(自身を含む): 21952000

約数和(自身を除く): 3231291

約数列:

[1, 7, 79, 97, 349, 553, 679, 2443, 7663, 27571, 33853, 53641, 192997, 236971, 2674387, 18720709]

約数ペア:

[(1, 18720709), (7, 2674387), (79, 236971), (97, 192997), (349, 53641), (553, 33853), (679, 27571), (2443, 7663)]