20521120

素因数分解:

$2^5\times 5^1\times {\mathrm{128257}}^1$

素因数の和:128272

約数の個数: 24

約数和(自身を含む): 48481524

約数和(自身を除く): 27960404

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 128257, 256514, 513028, 641285, 1026056, 1282570, 2052112, 2565140, 4104224, 5130280, 10260560, 20521120]

約数ペア:

[(1, 20521120), (2, 10260560), (4, 5130280), (5, 4104224), (8, 2565140), (10, 2052112), (16, 1282570), (20, 1026056), (32, 641285), (40, 513028), (80, 256514), (160, 128257)]