20255865

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 39321600

約数和(自身を除く): 19065735

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 49, 93, 105, 127, 147, 155, 217, 245, 343, 381, 465, 635, 651, 735, 889, 1029, 1085, 1519, 1715, 1905, 2667, 3255, 3937, 4445, 4557, 5145, 6223, 7595, 10633, 11811, 13335, 18669, 19685, 22785, 27559, 31115, 31899, 43561, 53165, 59055, 82677, 93345, 130683, 137795, 159495, 192913, 217805, 413385, 578739, 653415, 964565, 1350391, 2893695, 4051173, 6751955, 20255865]

約数ペア:

[(1, 20255865), (3, 6751955), (5, 4051173), (7, 2893695), (15, 1350391), (21, 964565), (31, 653415), (35, 578739), (49, 413385), (93, 217805), (105, 192913), (127, 159495), (147, 137795), (155, 130683), (217, 93345), (245, 82677), (343, 59055), (381, 53165), (465, 43561), (635, 31899), (651, 31115), (735, 27559), (889, 22785), (1029, 19685), (1085, 18669), (1519, 13335), (1715, 11811), (1905, 10633), (2667, 7595), (3255, 6223), (3937, 5145), (4445, 4557)]