21640695

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 35707392

約数和(自身を除く): 14066697

約数列:

[1, 3, 5, 15, 53, 159, 163, 167, 265, 489, 501, 795, 815, 835, 2445, 2505, 8639, 8851, 25917, 26553, 27221, 43195, 44255, 81663, 129585, 132765, 136105, 408315, 1442713, 4328139, 7213565, 21640695]

約数ペア:

[(1, 21640695), (3, 7213565), (5, 4328139), (15, 1442713), (53, 408315), (159, 136105), (163, 132765), (167, 129585), (265, 81663), (489, 44255), (501, 43195), (795, 27221), (815, 26553), (835, 25917), (2445, 8851), (2505, 8639)]