15721965

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:279

約数の個数: 64

約数和(自身を含む): 32440320

約数和(自身を除く): 16718355

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 127, 131, 135, 189, 315, 381, 393, 635, 655, 889, 917, 945, 1143, 1179, 1905, 1965, 2667, 2751, 3429, 3537, 4445, 4585, 5715, 5895, 8001, 8253, 13335, 13755, 16637, 17145, 17685, 24003, 24759, 40005, 41265, 49911, 83185, 116459, 120015, 123795, 149733, 249555, 349377, 449199, 582295, 748665, 1048131, 1746885, 2245995, 3144393, 5240655, 15721965]

約数ペア:

[(1, 15721965), (3, 5240655), (5, 3144393), (7, 2245995), (9, 1746885), (15, 1048131), (21, 748665), (27, 582295), (35, 449199), (45, 349377), (63, 249555), (105, 149733), (127, 123795), (131, 120015), (135, 116459), (189, 83185), (315, 49911), (381, 41265), (393, 40005), (635, 24759), (655, 24003), (889, 17685), (917, 17145), (945, 16637), (1143, 13755), (1179, 13335), (1905, 8253), (1965, 8001), (2667, 5895), (2751, 5715), (3429, 4585), (3537, 4445)]