20818180

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{22147}}^1$

素因数の和:22203

約数の個数: 24

約数和(自身を含む): 44650368

約数和(自身を除く): 23832188

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 22147, 44294, 88588, 110735, 221470, 442940, 1040909, 2081818, 4163636, 5204545, 10409090, 20818180]

約数ペア:

[(1, 20818180), (2, 10409090), (4, 5204545), (5, 4163636), (10, 2081818), (20, 1040909), (47, 442940), (94, 221470), (188, 110735), (235, 88588), (470, 44294), (940, 22147)]