19957564

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{1109}}^1$

素因数の和:1533

約数の個数: 24

約数和(自身を含む): 38228400

約数和(自身を除く): 18270836

約数列:

[1, 2, 4, 11, 22, 44, 409, 818, 1109, 1636, 2218, 4436, 4499, 8998, 12199, 17996, 24398, 48796, 453581, 907162, 1814324, 4989391, 9978782, 19957564]

約数ペア:

[(1, 19957564), (2, 9978782), (4, 4989391), (11, 1814324), (22, 907162), (44, 453581), (409, 48796), (818, 24398), (1109, 17996), (1636, 12199), (2218, 8998), (4436, 4499)]