18090639

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 31549440

約数和(自身を除く): 13458801

約数列:

[1, 3, 7, 9, 21, 31, 59, 63, 93, 157, 177, 217, 279, 413, 471, 531, 651, 1099, 1239, 1413, 1829, 1953, 3297, 3717, 4867, 5487, 9263, 9891, 12803, 14601, 16461, 27789, 34069, 38409, 43803, 64841, 83367, 102207, 115227, 194523, 287153, 306621, 583569, 861459, 2010071, 2584377, 6030213, 18090639]

約数ペア:

[(1, 18090639), (3, 6030213), (7, 2584377), (9, 2010071), (21, 861459), (31, 583569), (59, 306621), (63, 287153), (93, 194523), (157, 115227), (177, 102207), (217, 83367), (279, 64841), (413, 43803), (471, 38409), (531, 34069), (651, 27789), (1099, 16461), (1239, 14601), (1413, 12803), (1829, 9891), (1953, 9263), (3297, 5487), (3717, 4867)]