21056739

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10876701

約数列:

[1, 3, 11, 33, 41, 79, 123, 197, 237, 451, 591, 869, 1353, 2167, 2607, 3239, 6501, 8077, 9717, 15563, 24231, 35629, 46689, 88847, 106887, 171193, 266541, 513579, 638083, 1914249, 7018913, 21056739]

約数ペア:

[(1, 21056739), (3, 7018913), (11, 1914249), (33, 638083), (41, 513579), (79, 266541), (123, 171193), (197, 106887), (237, 88847), (451, 46689), (591, 35629), (869, 24231), (1353, 15563), (2167, 9717), (2607, 8077), (3239, 6501)]