21421557

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{523}}^1$

素因数の和:610

約数の個数: 32

約数和(自身を含む): 33452160

約数和(自身を除く): 12030603

約数列:

[1, 3, 9, 27, 37, 41, 111, 123, 333, 369, 523, 999, 1107, 1517, 1569, 4551, 4707, 13653, 14121, 19351, 21443, 40959, 58053, 64329, 174159, 192987, 522477, 578961, 793391, 2380173, 7140519, 21421557]

約数ペア:

[(1, 21421557), (3, 7140519), (9, 2380173), (27, 793391), (37, 578961), (41, 522477), (111, 192987), (123, 174159), (333, 64329), (369, 58053), (523, 40959), (999, 21443), (1107, 19351), (1517, 14121), (1569, 13653), (4551, 4707)]