19983280

素因数分解:

$2^4\times 5^1\times {\mathrm{439}}^1\times {\mathrm{569}}^1$

素因数の和:1021

約数の個数: 40

約数和(自身を含む): 46648800

約数和(自身を除く): 26665520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 439, 569, 878, 1138, 1756, 2195, 2276, 2845, 3512, 4390, 4552, 5690, 7024, 8780, 9104, 11380, 17560, 22760, 35120, 45520, 249791, 499582, 999164, 1248955, 1998328, 2497910, 3996656, 4995820, 9991640, 19983280]

約数ペア:

[(1, 19983280), (2, 9991640), (4, 4995820), (5, 3996656), (8, 2497910), (10, 1998328), (16, 1248955), (20, 999164), (40, 499582), (80, 249791), (439, 45520), (569, 35120), (878, 22760), (1138, 17560), (1756, 11380), (2195, 9104), (2276, 8780), (2845, 7024), (3512, 5690), (4390, 4552)]