21105495

素因数分解:

$3^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1231}}^1$

素因数の和:1372

約数の個数: 32

約数和(自身を含む): 37847040

約数和(自身を除く): 16741545

約数列:

[1, 3, 5, 9, 15, 27, 45, 127, 135, 381, 635, 1143, 1231, 1905, 3429, 3693, 5715, 6155, 11079, 17145, 18465, 33237, 55395, 156337, 166185, 469011, 781685, 1407033, 2345055, 4221099, 7035165, 21105495]

約数ペア:

[(1, 21105495), (3, 7035165), (5, 4221099), (9, 2345055), (15, 1407033), (27, 781685), (45, 469011), (127, 166185), (135, 156337), (381, 55395), (635, 33237), (1143, 18465), (1231, 17145), (1905, 11079), (3429, 6155), (3693, 5715)]