21770480

素因数分解:

$2^4\times 5^1\times {\mathrm{272131}}^1$

素因数の和:272144

約数の個数: 20

約数和(自身を含む): 50616552

約数和(自身を除く): 28846072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272131, 544262, 1088524, 1360655, 2177048, 2721310, 4354096, 5442620, 10885240, 21770480]

約数ペア:

[(1, 21770480), (2, 10885240), (4, 5442620), (5, 4354096), (8, 2721310), (10, 2177048), (16, 1360655), (20, 1088524), (40, 544262), (80, 272131)]