20905206

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1$

素因数の和:138

約数の個数: 128

約数和(自身を含む): 56401920

約数和(自身を除く): 35496714

約数列:

[1, 2, 3, 6, 7, 14, 17, 19, 21, 23, 34, 38, 42, 46, 51, 57, 67, 69, 102, 114, 119, 133, 134, 138, 161, 201, 238, 266, 322, 323, 357, 391, 399, 402, 437, 469, 483, 646, 714, 782, 798, 874, 938, 966, 969, 1139, 1173, 1273, 1311, 1407, 1541, 1938, 2261, 2278, 2346, 2546, 2622, 2737, 2814, 3059, 3082, 3417, 3819, 4522, 4623, 5474, 6118, 6783, 6834, 7429, 7638, 7973, 8211, 8911, 9177, 9246, 10787, 13566, 14858, 15946, 16422, 17822, 18354, 21574, 21641, 22287, 23919, 26197, 26733, 29279, 32361, 43282, 44574, 47838, 52003, 52394, 53466, 58558, 64722, 64923, 78591, 87837, 104006, 129846, 151487, 156009, 157182, 175674, 183379, 204953, 302974, 312018, 366758, 409906, 454461, 497743, 550137, 614859, 908922, 995486, 1100274, 1229718, 1493229, 2986458, 3484201, 6968402, 10452603, 20905206]

約数ペア:

[(1, 20905206), (2, 10452603), (3, 6968402), (6, 3484201), (7, 2986458), (14, 1493229), (17, 1229718), (19, 1100274), (21, 995486), (23, 908922), (34, 614859), (38, 550137), (42, 497743), (46, 454461), (51, 409906), (57, 366758), (67, 312018), (69, 302974), (102, 204953), (114, 183379), (119, 175674), (133, 157182), (134, 156009), (138, 151487), (161, 129846), (201, 104006), (238, 87837), (266, 78591), (322, 64923), (323, 64722), (357, 58558), (391, 53466), (399, 52394), (402, 52003), (437, 47838), (469, 44574), (483, 43282), (646, 32361), (714, 29279), (782, 26733), (798, 26197), (874, 23919), (938, 22287), (966, 21641), (969, 21574), (1139, 18354), (1173, 17822), (1273, 16422), (1311, 15946), (1407, 14858), (1541, 13566), (1938, 10787), (2261, 9246), (2278, 9177), (2346, 8911), (2546, 8211), (2622, 7973), (2737, 7638), (2814, 7429), (3059, 6834), (3082, 6783), (3417, 6118), (3819, 5474), (4522, 4623)]