20751880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7307}}^1$

素因数の和:7389

約数の個数: 32

約数和(自身を含む): 47355840

約数和(自身を除く): 26603960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7307, 14614, 29228, 36535, 58456, 73070, 146140, 292280, 518797, 1037594, 2075188, 2593985, 4150376, 5187970, 10375940, 20751880]

約数ペア:

[(1, 20751880), (2, 10375940), (4, 5187970), (5, 4150376), (8, 2593985), (10, 2075188), (20, 1037594), (40, 518797), (71, 292280), (142, 146140), (284, 73070), (355, 58456), (568, 36535), (710, 29228), (1420, 14614), (2840, 7307)]