20042780

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5087}}^1$

素因数の和:5293

約数の個数: 24

約数和(自身を含む): 42311808

約数和(自身を除く): 22269028

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5087, 10174, 20348, 25435, 50870, 101740, 1002139, 2004278, 4008556, 5010695, 10021390, 20042780]

約数ペア:

[(1, 20042780), (2, 10021390), (4, 5010695), (5, 4008556), (10, 2004278), (20, 1002139), (197, 101740), (394, 50870), (788, 25435), (985, 20348), (1970, 10174), (3940, 5087)]