20165120

素因数分解:

$2^9\times 5^1\times {\mathrm{7877}}^1$

素因数の和:7900

約数の個数: 40

約数和(自身を含む): 48355164

約数和(自身を除く): 28190044

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7877, 15754, 31508, 39385, 63016, 78770, 126032, 157540, 252064, 315080, 504128, 630160, 1008256, 1260320, 2016512, 2520640, 4033024, 5041280, 10082560, 20165120]

約数ペア:

[(1, 20165120), (2, 10082560), (4, 5041280), (5, 4033024), (8, 2520640), (10, 2016512), (16, 1260320), (20, 1008256), (32, 630160), (40, 504128), (64, 315080), (80, 252064), (128, 157540), (160, 126032), (256, 78770), (320, 63016), (512, 39385), (640, 31508), (1280, 15754), (2560, 7877)]