20181728

素因数分解:

$2^5\times 7^2\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:296

約数の個数: 72

約数和(自身を含む): 47200104

約数和(自身を除く): 27018376

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 61, 98, 112, 122, 196, 211, 224, 244, 392, 422, 427, 488, 784, 844, 854, 976, 1477, 1568, 1688, 1708, 1952, 2954, 2989, 3376, 3416, 5908, 5978, 6752, 6832, 10339, 11816, 11956, 12871, 13664, 20678, 23632, 23912, 25742, 41356, 47264, 47824, 51484, 82712, 90097, 95648, 102968, 165424, 180194, 205936, 330848, 360388, 411872, 630679, 720776, 1261358, 1441552, 2522716, 2883104, 5045432, 10090864, 20181728]

約数ペア:

[(1, 20181728), (2, 10090864), (4, 5045432), (7, 2883104), (8, 2522716), (14, 1441552), (16, 1261358), (28, 720776), (32, 630679), (49, 411872), (56, 360388), (61, 330848), (98, 205936), (112, 180194), (122, 165424), (196, 102968), (211, 95648), (224, 90097), (244, 82712), (392, 51484), (422, 47824), (427, 47264), (488, 41356), (784, 25742), (844, 23912), (854, 23632), (976, 20678), (1477, 13664), (1568, 12871), (1688, 11956), (1708, 11816), (1952, 10339), (2954, 6832), (2989, 6752), (3376, 5978), (3416, 5908)]