21484660

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{2447}}^1$

素因数の和:2895

約数の個数: 24

約数和(自身を含む): 45239040

約数和(自身を除く): 23754380

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 2447, 4390, 4894, 8780, 9788, 12235, 24470, 48940, 1074233, 2148466, 4296932, 5371165, 10742330, 21484660]

約数ペア:

[(1, 21484660), (2, 10742330), (4, 5371165), (5, 4296932), (10, 2148466), (20, 1074233), (439, 48940), (878, 24470), (1756, 12235), (2195, 9788), (2447, 8780), (4390, 4894)]