21380656

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:178

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 26830544

約数列:

[1, 2, 4, 8, 11, 16, 22, 29, 44, 58, 59, 71, 88, 116, 118, 142, 176, 232, 236, 284, 319, 464, 472, 568, 638, 649, 781, 944, 1136, 1276, 1298, 1562, 1711, 2059, 2552, 2596, 3124, 3422, 4118, 4189, 5104, 5192, 6248, 6844, 8236, 8378, 10384, 12496, 13688, 16472, 16756, 18821, 22649, 27376, 32944, 33512, 37642, 45298, 46079, 67024, 75284, 90596, 92158, 121481, 150568, 181192, 184316, 242962, 301136, 362384, 368632, 485924, 737264, 971848, 1336291, 1943696, 2672582, 5345164, 10690328, 21380656]

約数ペア:

[(1, 21380656), (2, 10690328), (4, 5345164), (8, 2672582), (11, 1943696), (16, 1336291), (22, 971848), (29, 737264), (44, 485924), (58, 368632), (59, 362384), (71, 301136), (88, 242962), (116, 184316), (118, 181192), (142, 150568), (176, 121481), (232, 92158), (236, 90596), (284, 75284), (319, 67024), (464, 46079), (472, 45298), (568, 37642), (638, 33512), (649, 32944), (781, 27376), (944, 22649), (1136, 18821), (1276, 16756), (1298, 16472), (1562, 13688), (1711, 12496), (2059, 10384), (2552, 8378), (2596, 8236), (3124, 6844), (3422, 6248), (4118, 5192), (4189, 5104)]