20691390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{689713}}^1$

素因数の和:689723

約数の個数: 16

約数和(自身を含む): 49659408

約数和(自身を除く): 28968018

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 689713, 1379426, 2069139, 3448565, 4138278, 6897130, 10345695, 20691390]

約数ペア:

[(1, 20691390), (2, 10345695), (3, 6897130), (5, 4138278), (6, 3448565), (10, 2069139), (15, 1379426), (30, 689713)]