19800980

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{5531}}^1$

素因数の和:5719

約数の個数: 24

約数和(自身を含む): 41821920

約数和(自身を除く): 22020940

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 5531, 11062, 22124, 27655, 55310, 110620, 990049, 1980098, 3960196, 4950245, 9900490, 19800980]

約数ペア:

[(1, 19800980), (2, 9900490), (4, 4950245), (5, 3960196), (10, 1980098), (20, 990049), (179, 110620), (358, 55310), (716, 27655), (895, 22124), (1790, 11062), (3580, 5531)]