21272715

素因数分解:

$3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3011}}^1$

素因数の和:3179

約数の個数: 24

約数和(自身を含む): 37119888

約数和(自身を除く): 15847173

約数列:

[1, 3, 5, 9, 15, 45, 157, 471, 785, 1413, 2355, 3011, 7065, 9033, 15055, 27099, 45165, 135495, 472727, 1418181, 2363635, 4254543, 7090905, 21272715]

約数ペア:

[(1, 21272715), (3, 7090905), (5, 4254543), (9, 2363635), (15, 1418181), (45, 472727), (157, 135495), (471, 45165), (785, 27099), (1413, 15055), (2355, 9033), (3011, 7065)]