20167720

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{883}}^1$

素因数の和:1465

約数の個数: 32

約数和(自身を含む): 45508320

約数和(自身を除く): 25340600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 883, 1142, 1766, 2284, 2855, 3532, 4415, 4568, 5710, 7064, 8830, 11420, 17660, 22840, 35320, 504193, 1008386, 2016772, 2520965, 4033544, 5041930, 10083860, 20167720]

約数ペア:

[(1, 20167720), (2, 10083860), (4, 5041930), (5, 4033544), (8, 2520965), (10, 2016772), (20, 1008386), (40, 504193), (571, 35320), (883, 22840), (1142, 17660), (1766, 11420), (2284, 8830), (2855, 7064), (3532, 5710), (4415, 4568)]