21000833307

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{293}}^1\times {\mathrm{487}}^1$

素因数の和:894

約数の個数: 80

約数和(自身を含む): 33331415040

約数和(自身を除く): 12330581733

約数列:

[1, 3, 9, 23, 27, 69, 79, 81, 207, 237, 293, 487, 621, 711, 879, 1461, 1817, 1863, 2133, 2637, 4383, 5451, 6399, 6739, 7911, 11201, 13149, 16353, 20217, 23147, 23733, 33603, 38473, 39447, 49059, 60651, 69441, 100809, 115419, 142691, 147177, 181953, 208323, 302427, 346257, 428073, 532381, 545859, 624969, 884879, 907281, 1038771, 1284219, 1597143, 1874907, 2654637, 3116313, 3281893, 3852657, 4791429, 7963911, 9845679, 11272589, 11557971, 14374287, 23891733, 29537037, 33817767, 43122861, 71675199, 88611111, 101453301, 259269547, 265833333, 304359903, 777808641, 913079709, 2333425923, 7000277769, 21000833307]

約数ペア:

[(1, 21000833307), (3, 7000277769), (9, 2333425923), (23, 913079709), (27, 777808641), (69, 304359903), (79, 265833333), (81, 259269547), (207, 101453301), (237, 88611111), (293, 71675199), (487, 43122861), (621, 33817767), (711, 29537037), (879, 23891733), (1461, 14374287), (1817, 11557971), (1863, 11272589), (2133, 9845679), (2637, 7963911), (4383, 4791429), (5451, 3852657), (6399, 3281893), (6739, 3116313), (7911, 2654637), (11201, 1874907), (13149, 1597143), (16353, 1284219), (20217, 1038771), (23147, 907281), (23733, 884879), (33603, 624969), (38473, 545859), (39447, 532381), (49059, 428073), (60651, 346257), (69441, 302427), (100809, 208323), (115419, 181953), (142691, 147177)]