21369047

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{283}}^1$

素因数の和:387

約数の個数: 24

約数和(自身を含む): 26418816

約数和(自身を除く): 5049769

約数列:

[1, 7, 23, 49, 67, 161, 283, 469, 1127, 1541, 1981, 3283, 6509, 10787, 13867, 18961, 45563, 75509, 132727, 318941, 436103, 929089, 3052721, 21369047]

約数ペア:

[(1, 21369047), (7, 3052721), (23, 929089), (49, 436103), (67, 318941), (161, 132727), (283, 75509), (469, 45563), (1127, 18961), (1541, 13867), (1981, 10787), (3283, 6509)]