21064870

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{123911}}^1$

素因数の和:123935

約数の個数: 16

約数和(自身を含む): 40147488

約数和(自身を除く): 19082618

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 123911, 247822, 619555, 1239110, 2106487, 4212974, 10532435, 21064870]

約数ペア:

[(1, 21064870), (2, 10532435), (5, 4212974), (10, 2106487), (17, 1239110), (34, 619555), (85, 247822), (170, 123911)]