21705651

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1433}}^1$

素因数の和:1473

約数の個数: 40

約数和(自身を含む): 37479024

約数和(自身を除く): 15773373

約数列:

[1, 3, 9, 11, 17, 27, 33, 51, 81, 99, 153, 187, 297, 459, 561, 891, 1377, 1433, 1683, 4299, 5049, 12897, 15147, 15763, 24361, 38691, 47289, 73083, 116073, 141867, 219249, 267971, 425601, 657747, 803913, 1276803, 1973241, 2411739, 7235217, 21705651]

約数ペア:

[(1, 21705651), (3, 7235217), (9, 2411739), (11, 1973241), (17, 1276803), (27, 803913), (33, 657747), (51, 425601), (81, 267971), (99, 219249), (153, 141867), (187, 116073), (297, 73083), (459, 47289), (561, 38691), (891, 24361), (1377, 15763), (1433, 15147), (1683, 12897), (4299, 5049)]