18032620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{21991}}^1$

素因数の和:22041

約数の個数: 24

約数和(自身を含む): 38793888

約数和(自身を除く): 20761268

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 21991, 43982, 87964, 109955, 219910, 439820, 901631, 1803262, 3606524, 4508155, 9016310, 18032620]

約数ペア:

[(1, 18032620), (2, 9016310), (4, 4508155), (5, 3606524), (10, 1803262), (20, 901631), (41, 439820), (82, 219910), (164, 109955), (205, 87964), (410, 43982), (820, 21991)]