20996120

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7393}}^1$

素因数の和:7475

約数の個数: 32

約数和(自身を含む): 47913120

約数和(自身を除く): 26917000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7393, 14786, 29572, 36965, 59144, 73930, 147860, 295720, 524903, 1049806, 2099612, 2624515, 4199224, 5249030, 10498060, 20996120]

約数ペア:

[(1, 20996120), (2, 10498060), (4, 5249030), (5, 4199224), (8, 2624515), (10, 2099612), (20, 1049806), (40, 524903), (71, 295720), (142, 147860), (284, 73930), (355, 59144), (568, 36965), (710, 29572), (1420, 14786), (2840, 7393)]