18038960

素因数分解:

$2^4\times 5^1\times {\mathrm{443}}^1\times {\mathrm{509}}^1$

素因数の和:965

約数の個数: 40

約数和(自身を含む): 42117840

約数和(自身を除く): 24078880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 443, 509, 886, 1018, 1772, 2036, 2215, 2545, 3544, 4072, 4430, 5090, 7088, 8144, 8860, 10180, 17720, 20360, 35440, 40720, 225487, 450974, 901948, 1127435, 1803896, 2254870, 3607792, 4509740, 9019480, 18038960]

約数ペア:

[(1, 18038960), (2, 9019480), (4, 4509740), (5, 3607792), (8, 2254870), (10, 1803896), (16, 1127435), (20, 901948), (40, 450974), (80, 225487), (443, 40720), (509, 35440), (886, 20360), (1018, 17720), (1772, 10180), (2036, 8860), (2215, 8144), (2545, 7088), (3544, 5090), (4072, 4430)]