20653215

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 39398400

約数和(自身を除く): 18745185

約数列:

[1, 3, 5, 11, 15, 17, 33, 37, 51, 55, 85, 111, 165, 185, 187, 199, 255, 407, 555, 561, 597, 629, 935, 995, 1221, 1887, 2035, 2189, 2805, 2985, 3145, 3383, 6105, 6567, 6919, 7363, 9435, 10149, 10945, 16915, 20757, 22089, 32835, 34595, 36815, 37213, 50745, 80993, 103785, 110445, 111639, 125171, 186065, 242979, 375513, 404965, 558195, 625855, 1214895, 1376881, 1877565, 4130643, 6884405, 20653215]

約数ペア:

[(1, 20653215), (3, 6884405), (5, 4130643), (11, 1877565), (15, 1376881), (17, 1214895), (33, 625855), (37, 558195), (51, 404965), (55, 375513), (85, 242979), (111, 186065), (165, 125171), (185, 111639), (187, 110445), (199, 103785), (255, 80993), (407, 50745), (555, 37213), (561, 36815), (597, 34595), (629, 32835), (935, 22089), (995, 20757), (1221, 16915), (1887, 10945), (2035, 10149), (2189, 9435), (2805, 7363), (2985, 6919), (3145, 6567), (3383, 6105)]