20161780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1049}}^1$

素因数の和:1120

約数の個数: 36

約数和(自身を含む): 43791300

約数和(自身を除く): 23629520

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1049, 1922, 2098, 3844, 4196, 4805, 5245, 9610, 10490, 19220, 20980, 32519, 65038, 130076, 162595, 325190, 650380, 1008089, 2016178, 4032356, 5040445, 10080890, 20161780]

約数ペア:

[(1, 20161780), (2, 10080890), (4, 5040445), (5, 4032356), (10, 2016178), (20, 1008089), (31, 650380), (62, 325190), (124, 162595), (155, 130076), (310, 65038), (620, 32519), (961, 20980), (1049, 19220), (1922, 10490), (2098, 9610), (3844, 5245), (4196, 4805)]