81206420

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{68819}}^1$

素因数の和:68887

約数の個数: 24

約数和(自身を含む): 173426400

約数和(自身を除く): 92219980

約数列:

[1, 2, 4, 5, 10, 20, 59, 118, 236, 295, 590, 1180, 68819, 137638, 275276, 344095, 688190, 1376380, 4060321, 8120642, 16241284, 20301605, 40603210, 81206420]

約数ペア:

[(1, 81206420), (2, 40603210), (4, 20301605), (5, 16241284), (10, 8120642), (20, 4060321), (59, 1376380), (118, 688190), (236, 344095), (295, 275276), (590, 137638), (1180, 68819)]