19805920

素因数分解:

$2^5\times 5^1\times {\mathrm{123787}}^1$

素因数の和:123802

約数の個数: 24

約数和(自身を含む): 46791864

約数和(自身を除く): 26985944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 123787, 247574, 495148, 618935, 990296, 1237870, 1980592, 2475740, 3961184, 4951480, 9902960, 19805920]

約数ペア:

[(1, 19805920), (2, 9902960), (4, 4951480), (5, 3961184), (8, 2475740), (10, 1980592), (16, 1237870), (20, 990296), (32, 618935), (40, 495148), (80, 247574), (160, 123787)]