20668767

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{487}}^1$

素因数の和:587

約数の個数: 32

約数和(自身を含む): 32980992

約数和(自身を除く): 12312225

約数列:

[1, 3, 7, 21, 43, 47, 129, 141, 301, 329, 487, 903, 987, 1461, 2021, 3409, 6063, 10227, 14147, 20941, 22889, 42441, 62823, 68667, 146587, 160223, 439761, 480669, 984227, 2952681, 6889589, 20668767]

約数ペア:

[(1, 20668767), (3, 6889589), (7, 2952681), (21, 984227), (43, 480669), (47, 439761), (129, 160223), (141, 146587), (301, 68667), (329, 62823), (487, 42441), (903, 22889), (987, 20941), (1461, 14147), (2021, 10227), (3409, 6063)]