20728630

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{503}}^1$

素因数の和:840

約数の個数: 32

約数和(自身を含む): 40388544

約数和(自身を除く): 19659914

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 317, 503, 634, 1006, 1585, 2515, 3170, 4121, 5030, 6539, 8242, 13078, 20605, 32695, 41210, 65390, 159451, 318902, 797255, 1594510, 2072863, 4145726, 10364315, 20728630]

約数ペア:

[(1, 20728630), (2, 10364315), (5, 4145726), (10, 2072863), (13, 1594510), (26, 797255), (65, 318902), (130, 159451), (317, 65390), (503, 41210), (634, 32695), (1006, 20605), (1585, 13078), (2515, 8242), (3170, 6539), (4121, 5030)]