20717540

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4127}}^1$

素因数の和:4387

約数の個数: 24

約数和(自身を含む): 43690752

約数和(自身を除く): 22973212

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 4127, 5020, 8254, 16508, 20635, 41270, 82540, 1035877, 2071754, 4143508, 5179385, 10358770, 20717540]

約数ペア:

[(1, 20717540), (2, 10358770), (4, 5179385), (5, 4143508), (10, 2071754), (20, 1035877), (251, 82540), (502, 41270), (1004, 20635), (1255, 16508), (2510, 8254), (4127, 5020)]