21087213

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{14143}}^1$

素因数の和:14224

約数の個数: 16

約数和(自身を含む): 32587776

約数和(自身を除く): 11500563

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 14143, 42429, 99001, 297003, 1004153, 3012459, 7029071, 21087213]

約数ペア:

[(1, 21087213), (3, 7029071), (7, 3012459), (21, 1004153), (71, 297003), (213, 99001), (497, 42429), (1491, 14143)]