1291520

素因数分解:

$2^8\times 5^1\times {\mathrm{1009}}^1$

素因数の和:1030

約数の個数: 36

約数和(自身を含む): 3096660

約数和(自身を除く): 1805140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1009, 1280, 2018, 4036, 5045, 8072, 10090, 16144, 20180, 32288, 40360, 64576, 80720, 129152, 161440, 258304, 322880, 645760, 1291520]

約数ペア:

[(1, 1291520), (2, 645760), (4, 322880), (5, 258304), (8, 161440), (10, 129152), (16, 80720), (20, 64576), (32, 40360), (40, 32288), (64, 20180), (80, 16144), (128, 10090), (160, 8072), (256, 5045), (320, 4036), (640, 2018), (1009, 1280)]