81582140

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37423}}^1$

素因数の和:37541

約数の個数: 24

約数和(自身を含む): 172898880

約数和(自身を除く): 91316740

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37423, 74846, 149692, 187115, 374230, 748460, 4079107, 8158214, 16316428, 20395535, 40791070, 81582140]

約数ペア:

[(1, 81582140), (2, 40791070), (4, 20395535), (5, 16316428), (10, 8158214), (20, 4079107), (109, 748460), (218, 374230), (436, 187115), (545, 149692), (1090, 74846), (2180, 37423)]