21427839

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{149}}^1$

素因数の和:232

約数の個数: 36

約数和(自身を含む): 33969000

約数和(自身を除く): 12541161

約数列:

[1, 3, 9, 19, 29, 57, 87, 149, 171, 261, 447, 551, 841, 1341, 1653, 2523, 2831, 4321, 4959, 7569, 8493, 12963, 15979, 25479, 38889, 47937, 82099, 125309, 143811, 246297, 375927, 738891, 1127781, 2380871, 7142613, 21427839]

約数ペア:

[(1, 21427839), (3, 7142613), (9, 2380871), (19, 1127781), (29, 738891), (57, 375927), (87, 246297), (149, 143811), (171, 125309), (261, 82099), (447, 47937), (551, 38889), (841, 25479), (1341, 15979), (1653, 12963), (2523, 8493), (2831, 7569), (4321, 4959)]