20654865

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1987}}^1$

素因数の和:2019

約数の個数: 64

約数和(自身を含む): 45803520

約数和(自身を除く): 25148655

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 99, 105, 135, 165, 189, 231, 297, 315, 385, 495, 693, 945, 1155, 1485, 1987, 2079, 3465, 5961, 9935, 10395, 13909, 17883, 21857, 29805, 41727, 53649, 65571, 69545, 89415, 109285, 125181, 152999, 196713, 208635, 268245, 327855, 375543, 458997, 590139, 625905, 764995, 983565, 1376991, 1877715, 2294985, 2950695, 4130973, 6884955, 20654865]

約数ペア:

[(1, 20654865), (3, 6884955), (5, 4130973), (7, 2950695), (9, 2294985), (11, 1877715), (15, 1376991), (21, 983565), (27, 764995), (33, 625905), (35, 590139), (45, 458997), (55, 375543), (63, 327855), (77, 268245), (99, 208635), (105, 196713), (135, 152999), (165, 125181), (189, 109285), (231, 89415), (297, 69545), (315, 65571), (385, 53649), (495, 41727), (693, 29805), (945, 21857), (1155, 17883), (1485, 13909), (1987, 10395), (2079, 9935), (3465, 5961)]