21017584

素因数分解:

$2^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:278

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 28979216

約数列:

[1, 2, 4, 7, 8, 14, 16, 23, 28, 41, 46, 56, 82, 92, 112, 161, 164, 184, 199, 287, 322, 328, 368, 398, 574, 644, 656, 796, 943, 1148, 1288, 1393, 1592, 1886, 2296, 2576, 2786, 3184, 3772, 4577, 4592, 5572, 6601, 7544, 8159, 9154, 11144, 13202, 15088, 16318, 18308, 22288, 26404, 32039, 32636, 36616, 52808, 57113, 64078, 65272, 73232, 105616, 114226, 128156, 130544, 187657, 228452, 256312, 375314, 456904, 512624, 750628, 913808, 1313599, 1501256, 2627198, 3002512, 5254396, 10508792, 21017584]

約数ペア:

[(1, 21017584), (2, 10508792), (4, 5254396), (7, 3002512), (8, 2627198), (14, 1501256), (16, 1313599), (23, 913808), (28, 750628), (41, 512624), (46, 456904), (56, 375314), (82, 256312), (92, 228452), (112, 187657), (161, 130544), (164, 128156), (184, 114226), (199, 105616), (287, 73232), (322, 65272), (328, 64078), (368, 57113), (398, 52808), (574, 36616), (644, 32636), (656, 32039), (796, 26404), (943, 22288), (1148, 18308), (1288, 16318), (1393, 15088), (1592, 13202), (1886, 11144), (2296, 9154), (2576, 8159), (2786, 7544), (3184, 6601), (3772, 5572), (4577, 4592)]