20687745

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{383}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 35868672

約数和(自身を除く): 15180927

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 277, 383, 831, 1149, 1385, 1915, 3601, 4155, 4979, 5745, 10803, 14937, 18005, 24895, 54015, 74685, 106091, 318273, 530455, 1379183, 1591365, 4137549, 6895915, 20687745]

約数ペア:

[(1, 20687745), (3, 6895915), (5, 4137549), (13, 1591365), (15, 1379183), (39, 530455), (65, 318273), (195, 106091), (277, 74685), (383, 54015), (831, 24895), (1149, 18005), (1385, 14937), (1915, 10803), (3601, 5745), (4155, 4979)]