20451880

素因数分解:

$2^3\times 5^1\times {\mathrm{511297}}^1$

素因数の和:511308

約数の個数: 16

約数和(自身を含む): 46016820

約数和(自身を除く): 25564940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 511297, 1022594, 2045188, 2556485, 4090376, 5112970, 10225940, 20451880]

約数ペア:

[(1, 20451880), (2, 10225940), (4, 5112970), (5, 4090376), (8, 2556485), (10, 2045188), (20, 1022594), (40, 511297)]