18909891

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2099}}^1$

素因数の和:2136

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 17781309

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 63, 77, 91, 99, 117, 143, 231, 273, 429, 693, 819, 1001, 1287, 2099, 3003, 6297, 9009, 14693, 18891, 23089, 27287, 44079, 69267, 81861, 132237, 161623, 191009, 207801, 245583, 300157, 484869, 573027, 900471, 1454607, 1719081, 2101099, 2701413, 6303297, 18909891]

約数ペア:

[(1, 18909891), (3, 6303297), (7, 2701413), (9, 2101099), (11, 1719081), (13, 1454607), (21, 900471), (33, 573027), (39, 484869), (63, 300157), (77, 245583), (91, 207801), (99, 191009), (117, 161623), (143, 132237), (231, 81861), (273, 69267), (429, 44079), (693, 27287), (819, 23089), (1001, 18891), (1287, 14693), (2099, 9009), (3003, 6297)]