18918999

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 12530601

約数列:

[1, 3, 9, 11, 33, 41, 59, 79, 99, 123, 177, 237, 369, 451, 531, 649, 711, 869, 1353, 1947, 2419, 2607, 3239, 4059, 4661, 5841, 7257, 7821, 9717, 13983, 21771, 26609, 29151, 35629, 41949, 51271, 79827, 106887, 153813, 191101, 239481, 320661, 461439, 573303, 1719909, 2102111, 6306333, 18918999]

約数ペア:

[(1, 18918999), (3, 6306333), (9, 2102111), (11, 1719909), (33, 573303), (41, 461439), (59, 320661), (79, 239481), (99, 191101), (123, 153813), (177, 106887), (237, 79827), (369, 51271), (451, 41949), (531, 35629), (649, 29151), (711, 26609), (869, 21771), (1353, 13983), (1947, 9717), (2419, 7821), (2607, 7257), (3239, 5841), (4059, 4661)]