18720065

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41143}}^1$

素因数の和:41168

約数の個数: 16

約数和(自身を含む): 27648768

約数和(自身を除く): 8928703

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 41143, 205715, 288001, 534859, 1440005, 2674295, 3744013, 18720065]

約数ペア:

[(1, 18720065), (5, 3744013), (7, 2674295), (13, 1440005), (35, 534859), (65, 288001), (91, 205715), (455, 41143)]