21240009

素因数分解:

$3^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{2741}}^1$

素因数の和:2798

約数の個数: 32

約数和(自身を含む): 36852480

約数和(自身を除く): 15612471

約数列:

[1, 3, 7, 9, 21, 27, 41, 63, 123, 189, 287, 369, 861, 1107, 2583, 2741, 7749, 8223, 19187, 24669, 57561, 74007, 112381, 172683, 337143, 518049, 786667, 1011429, 2360001, 3034287, 7080003, 21240009]

約数ペア:

[(1, 21240009), (3, 7080003), (7, 3034287), (9, 2360001), (21, 1011429), (27, 786667), (41, 518049), (63, 337143), (123, 172683), (189, 112381), (287, 74007), (369, 57561), (861, 24669), (1107, 19187), (2583, 8223), (2741, 7749)]