18990860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{135649}}^1$

素因数の和:135665

約数の個数: 24

約数和(自身を含む): 45578400

約数和(自身を除く): 26587540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 135649, 271298, 542596, 678245, 949543, 1356490, 1899086, 2712980, 3798172, 4747715, 9495430, 18990860]

約数ペア:

[(1, 18990860), (2, 9495430), (4, 4747715), (5, 3798172), (7, 2712980), (10, 1899086), (14, 1356490), (20, 949543), (28, 678245), (35, 542596), (70, 271298), (140, 135649)]