20806247

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 27287040

約数和(自身を除く): 6480793

約数列:

[1, 7, 11, 37, 67, 77, 109, 259, 407, 469, 737, 763, 1199, 2479, 2849, 4033, 5159, 7303, 8393, 17353, 27269, 28231, 44363, 51121, 80333, 190883, 270211, 310541, 562331, 1891477, 2972321, 20806247]

約数ペア:

[(1, 20806247), (7, 2972321), (11, 1891477), (37, 562331), (67, 310541), (77, 270211), (109, 190883), (259, 80333), (407, 51121), (469, 44363), (737, 28231), (763, 27269), (1199, 17353), (2479, 8393), (2849, 7303), (4033, 5159)]