19721920

素因数分解:

$2^6\times 5^1\times {\mathrm{61631}}^1$

素因数の和:61648

約数の個数: 28

約数和(自身を含む): 46963584

約数和(自身を除く): 27241664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 61631, 123262, 246524, 308155, 493048, 616310, 986096, 1232620, 1972192, 2465240, 3944384, 4930480, 9860960, 19721920]

約数ペア:

[(1, 19721920), (2, 9860960), (4, 4930480), (5, 3944384), (8, 2465240), (10, 1972192), (16, 1232620), (20, 986096), (32, 616310), (40, 493048), (64, 308155), (80, 246524), (160, 123262), (320, 61631)]