21805128

素因数分解:

$2^3\times 3^2\times {\mathrm{43}}^1\times {\mathrm{7043}}^1$

素因数の和:7098

約数の個数: 48

約数和(自身を含む): 60437520

約数和(自身を除く): 38632392

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 43, 72, 86, 129, 172, 258, 344, 387, 516, 774, 1032, 1548, 3096, 7043, 14086, 21129, 28172, 42258, 56344, 63387, 84516, 126774, 169032, 253548, 302849, 507096, 605698, 908547, 1211396, 1817094, 2422792, 2725641, 3634188, 5451282, 7268376, 10902564, 21805128]

約数ペア:

[(1, 21805128), (2, 10902564), (3, 7268376), (4, 5451282), (6, 3634188), (8, 2725641), (9, 2422792), (12, 1817094), (18, 1211396), (24, 908547), (36, 605698), (43, 507096), (72, 302849), (86, 253548), (129, 169032), (172, 126774), (258, 84516), (344, 63387), (387, 56344), (516, 42258), (774, 28172), (1032, 21129), (1548, 14086), (3096, 7043)]