21327237

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{127}}^1\times {\mathrm{397}}^1$

素因数の和:577

約数の個数: 24

約数和(自身を含む): 31789056

約数和(自身を除く): 10461819

約数列:

[1, 3, 9, 47, 127, 141, 381, 397, 423, 1143, 1191, 3573, 5969, 17907, 18659, 50419, 53721, 55977, 151257, 167931, 453771, 2369693, 7109079, 21327237]

約数ペア:

[(1, 21327237), (3, 7109079), (9, 2369693), (47, 453771), (127, 167931), (141, 151257), (381, 55977), (397, 53721), (423, 50419), (1143, 18659), (1191, 17907), (3573, 5969)]