20550985

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 32030208

約数和(自身を除く): 11479223

約数列:

[1, 5, 7, 13, 31, 35, 47, 65, 91, 155, 217, 235, 329, 403, 455, 611, 961, 1085, 1457, 1645, 2015, 2821, 3055, 4277, 4805, 6727, 7285, 10199, 12493, 14105, 18941, 21385, 33635, 45167, 50995, 62465, 87451, 94705, 132587, 225835, 316169, 437255, 587171, 662935, 1580845, 2935855, 4110197, 20550985]

約数ペア:

[(1, 20550985), (5, 4110197), (7, 2935855), (13, 1580845), (31, 662935), (35, 587171), (47, 437255), (65, 316169), (91, 225835), (155, 132587), (217, 94705), (235, 87451), (329, 62465), (403, 50995), (455, 45167), (611, 33635), (961, 21385), (1085, 18941), (1457, 14105), (1645, 12493), (2015, 10199), (2821, 7285), (3055, 6727), (4277, 4805)]