256811331

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{4201}}^1$

素因数の和:4323

約数の個数: 32

約数和(自身を含む): 406619136

約数和(自身を除く): 149807805

約数列:

[1, 3, 7, 21, 41, 71, 123, 213, 287, 497, 861, 1491, 2911, 4201, 8733, 12603, 20377, 29407, 61131, 88221, 172241, 298271, 516723, 894813, 1205687, 2087897, 3617061, 6263691, 12229111, 36687333, 85603777, 256811331]

約数ペア:

[(1, 256811331), (3, 85603777), (7, 36687333), (21, 12229111), (41, 6263691), (71, 3617061), (123, 2087897), (213, 1205687), (287, 894813), (497, 516723), (861, 298271), (1491, 172241), (2911, 88221), (4201, 61131), (8733, 29407), (12603, 20377)]