21221739

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{271}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 38697984

約数和(自身を除く): 17476245

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 113, 231, 271, 339, 693, 791, 813, 1017, 1243, 1897, 2373, 2439, 2981, 3729, 5691, 7119, 8701, 8943, 11187, 17073, 20867, 26103, 26829, 30623, 62601, 78309, 91869, 187803, 214361, 275607, 336853, 643083, 1010559, 1929249, 2357971, 3031677, 7073913, 21221739]

約数ペア:

[(1, 21221739), (3, 7073913), (7, 3031677), (9, 2357971), (11, 1929249), (21, 1010559), (33, 643083), (63, 336853), (77, 275607), (99, 214361), (113, 187803), (231, 91869), (271, 78309), (339, 62601), (693, 30623), (791, 26829), (813, 26103), (1017, 20867), (1243, 17073), (1897, 11187), (2373, 8943), (2439, 8701), (2981, 7119), (3729, 5691)]