20425040

素因数分解:

$2^4\times 5^1\times {\mathrm{255313}}^1$

素因数の和:255326

約数の個数: 20

約数和(自身を含む): 47488404

約数和(自身を除く): 27063364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255313, 510626, 1021252, 1276565, 2042504, 2553130, 4085008, 5106260, 10212520, 20425040]

約数ペア:

[(1, 20425040), (2, 10212520), (4, 5106260), (5, 4085008), (8, 2553130), (10, 2042504), (16, 1276565), (20, 1021252), (40, 510626), (80, 255313)]