18638720

素因数分解:

$2^7\times 5^1\times {\mathrm{29123}}^1$

素因数の和:29142

約数の個数: 32

約数和(自身を含む): 44559720

約数和(自身を除く): 25921000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 29123, 58246, 116492, 145615, 232984, 291230, 465968, 582460, 931936, 1164920, 1863872, 2329840, 3727744, 4659680, 9319360, 18638720]

約数ペア:

[(1, 18638720), (2, 9319360), (4, 4659680), (5, 3727744), (8, 2329840), (10, 1863872), (16, 1164920), (20, 931936), (32, 582460), (40, 465968), (64, 291230), (80, 232984), (128, 145615), (160, 116492), (320, 58246), (640, 29123)]