21391348

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{193}}^1\times {\mathrm{229}}^1$

素因数の和:448

約数の個数: 36

約数和(自身を含む): 41541220

約数和(自身を除く): 20149872

約数列:

[1, 2, 4, 11, 22, 44, 121, 193, 229, 242, 386, 458, 484, 772, 916, 2123, 2519, 4246, 5038, 8492, 10076, 23353, 27709, 44197, 46706, 55418, 88394, 93412, 110836, 176788, 486167, 972334, 1944668, 5347837, 10695674, 21391348]

約数ペア:

[(1, 21391348), (2, 10695674), (4, 5347837), (11, 1944668), (22, 972334), (44, 486167), (121, 176788), (193, 110836), (229, 93412), (242, 88394), (386, 55418), (458, 46706), (484, 44197), (772, 27709), (916, 23353), (2123, 10076), (2519, 8492), (4246, 5038)]