19906887

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{947}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 36312192

約数和(自身を除く): 16405305

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 947, 1001, 1617, 1911, 2841, 3003, 6629, 7007, 10417, 12311, 19887, 21021, 31251, 36933, 46403, 72919, 86177, 135421, 139209, 218757, 258531, 406263, 510433, 603239, 947947, 1531299, 1809717, 2843841, 6635629, 19906887]

約数ペア:

[(1, 19906887), (3, 6635629), (7, 2843841), (11, 1809717), (13, 1531299), (21, 947947), (33, 603239), (39, 510433), (49, 406263), (77, 258531), (91, 218757), (143, 139209), (147, 135421), (231, 86177), (273, 72919), (429, 46403), (539, 36933), (637, 31251), (947, 21021), (1001, 19887), (1617, 12311), (1911, 10417), (2841, 7007), (3003, 6629)]