20657640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{172147}}^1$

素因数の和:172161

約数の個数: 32

約数和(自身を含む): 61973280

約数和(自身を除く): 41315640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 172147, 344294, 516441, 688588, 860735, 1032882, 1377176, 1721470, 2065764, 2582205, 3442940, 4131528, 5164410, 6885880, 10328820, 20657640]

約数ペア:

[(1, 20657640), (2, 10328820), (3, 6885880), (4, 5164410), (5, 4131528), (6, 3442940), (8, 2582205), (10, 2065764), (12, 1721470), (15, 1377176), (20, 1032882), (24, 860735), (30, 688588), (40, 516441), (60, 344294), (120, 172147)]