21371679

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^2\times {\mathrm{353}}^1$

素因数の和:428

約数の個数: 36

約数和(自身を含む): 36558288

約数和(自身を除く): 15186609

約数列:

[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 353, 651, 961, 1059, 1953, 2471, 2883, 3177, 6727, 7413, 8649, 10943, 20181, 22239, 32829, 60543, 76601, 98487, 229803, 339233, 689409, 1017699, 2374631, 3053097, 7123893, 21371679]

約数ペア:

[(1, 21371679), (3, 7123893), (7, 3053097), (9, 2374631), (21, 1017699), (31, 689409), (63, 339233), (93, 229803), (217, 98487), (279, 76601), (353, 60543), (651, 32829), (961, 22239), (1059, 20181), (1953, 10943), (2471, 8649), (2883, 7413), (3177, 6727)]