20405763

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1$

素因数の和:138

約数の個数: 80

約数和(自身を含む): 38681280

約数和(自身を除く): 18275517

約数列:

[1, 3, 7, 9, 17, 21, 27, 29, 51, 63, 73, 81, 87, 119, 153, 189, 203, 219, 261, 357, 459, 493, 511, 567, 609, 657, 783, 1071, 1241, 1377, 1479, 1533, 1827, 1971, 2117, 2349, 3213, 3451, 3723, 4437, 4599, 5481, 5913, 6351, 8687, 9639, 10353, 11169, 13311, 13797, 14819, 16443, 19053, 26061, 31059, 33507, 35989, 39933, 41391, 44457, 57159, 78183, 93177, 100521, 107967, 133371, 171477, 234549, 251923, 279531, 323901, 400113, 703647, 755769, 971703, 1200339, 2267307, 2915109, 6801921, 20405763]

約数ペア:

[(1, 20405763), (3, 6801921), (7, 2915109), (9, 2267307), (17, 1200339), (21, 971703), (27, 755769), (29, 703647), (51, 400113), (63, 323901), (73, 279531), (81, 251923), (87, 234549), (119, 171477), (153, 133371), (189, 107967), (203, 100521), (219, 93177), (261, 78183), (357, 57159), (459, 44457), (493, 41391), (511, 39933), (567, 35989), (609, 33507), (657, 31059), (783, 26061), (1071, 19053), (1241, 16443), (1377, 14819), (1479, 13797), (1533, 13311), (1827, 11169), (1971, 10353), (2117, 9639), (2349, 8687), (3213, 6351), (3451, 5913), (3723, 5481), (4437, 4599)]