20801495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{619}}^1$

素因数の和:695

約数の個数: 32

約数和(自身を含む): 29998080

約数和(自身を除く): 9196585

約数列:

[1, 5, 11, 13, 47, 55, 65, 143, 235, 517, 611, 619, 715, 2585, 3055, 3095, 6721, 6809, 8047, 29093, 33605, 34045, 40235, 88517, 145465, 320023, 378209, 442585, 1600115, 1891045, 4160299, 20801495]

約数ペア:

[(1, 20801495), (5, 4160299), (11, 1891045), (13, 1600115), (47, 442585), (55, 378209), (65, 320023), (143, 145465), (235, 88517), (517, 40235), (611, 34045), (619, 33605), (715, 29093), (2585, 8047), (3055, 6809), (3095, 6721)]