21781818

素因数分解:

$2^1\times 3^3\times {\mathrm{311}}^1\times {\mathrm{1297}}^1$

素因数の和:1619

約数の個数: 32

約数和(自身を含む): 48597120

約数和(自身を除く): 26815302

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 311, 622, 933, 1297, 1866, 2594, 2799, 3891, 5598, 7782, 8397, 11673, 16794, 23346, 35019, 70038, 403367, 806734, 1210101, 2420202, 3630303, 7260606, 10890909, 21781818]

約数ペア:

[(1, 21781818), (2, 10890909), (3, 7260606), (6, 3630303), (9, 2420202), (18, 1210101), (27, 806734), (54, 403367), (311, 70038), (622, 35019), (933, 23346), (1297, 16794), (1866, 11673), (2594, 8397), (2799, 7782), (3891, 5598)]