20216495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 27525120

約数和(自身を除く): 7308625

約数列:

[1, 5, 13, 31, 65, 79, 127, 155, 395, 403, 635, 1027, 1651, 2015, 2449, 3937, 5135, 8255, 10033, 12245, 19685, 31837, 50165, 51181, 130429, 159185, 255905, 311023, 652145, 1555115, 4043299, 20216495]

約数ペア:

[(1, 20216495), (5, 4043299), (13, 1555115), (31, 652145), (65, 311023), (79, 255905), (127, 159185), (155, 130429), (395, 51181), (403, 50165), (635, 31837), (1027, 19685), (1651, 12245), (2015, 10033), (2449, 8255), (3937, 5135)]