18239660

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10247}}^1$

素因数の和:10345

約数の個数: 24

約数和(自身を含む): 38737440

約数和(自身を除く): 20497780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10247, 20494, 40988, 51235, 102470, 204940, 911983, 1823966, 3647932, 4559915, 9119830, 18239660]

約数ペア:

[(1, 18239660), (2, 9119830), (4, 4559915), (5, 3647932), (10, 1823966), (20, 911983), (89, 204940), (178, 102470), (356, 51235), (445, 40988), (890, 20494), (1780, 10247)]