19989729

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{139}}^1$

素因数の和:222

約数の個数: 36

約数和(自身を含む): 31704400

約数和(自身を除く): 11714671

約数列:

[1, 3, 9, 19, 29, 57, 87, 139, 171, 261, 417, 551, 841, 1251, 1653, 2523, 2641, 4031, 4959, 7569, 7923, 12093, 15979, 23769, 36279, 47937, 76589, 116899, 143811, 229767, 350697, 689301, 1052091, 2221081, 6663243, 19989729]

約数ペア:

[(1, 19989729), (3, 6663243), (9, 2221081), (19, 1052091), (29, 689301), (57, 350697), (87, 229767), (139, 143811), (171, 116899), (261, 76589), (417, 47937), (551, 36279), (841, 23769), (1251, 15979), (1653, 12093), (2523, 7923), (2641, 7569), (4031, 4959)]