21679845

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:226

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 19377435

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 59, 85, 131, 165, 177, 187, 255, 295, 393, 561, 649, 655, 885, 935, 1003, 1441, 1947, 1965, 2227, 2805, 3009, 3245, 4323, 5015, 6681, 7205, 7729, 9735, 11033, 11135, 15045, 21615, 23187, 24497, 33099, 33405, 38645, 55165, 73491, 85019, 115935, 122485, 131393, 165495, 255057, 367455, 394179, 425095, 656965, 1275285, 1445323, 1970895, 4335969, 7226615, 21679845]

約数ペア:

[(1, 21679845), (3, 7226615), (5, 4335969), (11, 1970895), (15, 1445323), (17, 1275285), (33, 656965), (51, 425095), (55, 394179), (59, 367455), (85, 255057), (131, 165495), (165, 131393), (177, 122485), (187, 115935), (255, 85019), (295, 73491), (393, 55165), (561, 38645), (649, 33405), (655, 33099), (885, 24497), (935, 23187), (1003, 21615), (1441, 15045), (1947, 11135), (1965, 11033), (2227, 9735), (2805, 7729), (3009, 7205), (3245, 6681), (4323, 5015)]