20041385

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2591}}^1$

素因数の和:2633

約数の個数: 32

約数和(自身を含む): 31352832

約数和(自身を除く): 11311447

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2591, 7735, 12955, 18137, 33683, 44047, 90685, 168415, 220235, 235781, 308329, 572611, 1178905, 1541645, 2863055, 4008277, 20041385]

約数ペア:

[(1, 20041385), (5, 4008277), (7, 2863055), (13, 1541645), (17, 1178905), (35, 572611), (65, 308329), (85, 235781), (91, 220235), (119, 168415), (221, 90685), (455, 44047), (595, 33683), (1105, 18137), (1547, 12955), (2591, 7735)]