20510728

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{521}}^1$

素因数の和:590

約数の個数: 64

約数和(自身を含む): 47606400

約数和(自身を除く): 27095672

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 37, 38, 56, 74, 76, 133, 148, 152, 259, 266, 296, 518, 521, 532, 703, 1036, 1042, 1064, 1406, 2072, 2084, 2812, 3647, 4168, 4921, 5624, 7294, 9842, 9899, 14588, 19277, 19684, 19798, 29176, 38554, 39368, 39596, 69293, 77108, 79192, 134939, 138586, 154216, 269878, 277172, 366263, 539756, 554344, 732526, 1079512, 1465052, 2563841, 2930104, 5127682, 10255364, 20510728]

約数ペア:

[(1, 20510728), (2, 10255364), (4, 5127682), (7, 2930104), (8, 2563841), (14, 1465052), (19, 1079512), (28, 732526), (37, 554344), (38, 539756), (56, 366263), (74, 277172), (76, 269878), (133, 154216), (148, 138586), (152, 134939), (259, 79192), (266, 77108), (296, 69293), (518, 39596), (521, 39368), (532, 38554), (703, 29176), (1036, 19798), (1042, 19684), (1064, 19277), (1406, 14588), (2072, 9899), (2084, 9842), (2812, 7294), (3647, 5624), (4168, 4921)]