20361509

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:162

約数の個数: 32

約数和(自身を含む): 25920000

約数和(自身を除く): 5558491

約数列:

[1, 7, 23, 29, 49, 89, 161, 203, 343, 623, 667, 1127, 1421, 2047, 2581, 4361, 4669, 7889, 9947, 14329, 18067, 30527, 32683, 59363, 100303, 126469, 228781, 415541, 702121, 885283, 2908787, 20361509]

約数ペア:

[(1, 20361509), (7, 2908787), (23, 885283), (29, 702121), (49, 415541), (89, 228781), (161, 126469), (203, 100303), (343, 59363), (623, 32683), (667, 30527), (1127, 18067), (1421, 14329), (2047, 9947), (2581, 7889), (4361, 4669)]