21780456

素因数分解:

$2^3\times 3^1\times {\mathrm{53}}^1\times {\mathrm{17123}}^1$

素因数の和:17185

約数の個数: 32

約数和(自身を含む): 55481760

約数和(自身を除く): 33701304

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 53, 106, 159, 212, 318, 424, 636, 1272, 17123, 34246, 51369, 68492, 102738, 136984, 205476, 410952, 907519, 1815038, 2722557, 3630076, 5445114, 7260152, 10890228, 21780456]

約数ペア:

[(1, 21780456), (2, 10890228), (3, 7260152), (4, 5445114), (6, 3630076), (8, 2722557), (12, 1815038), (24, 907519), (53, 410952), (106, 205476), (159, 136984), (212, 102738), (318, 68492), (424, 51369), (636, 34246), (1272, 17123)]