81019197

素因数分解:

$3^4\times 7^2\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:312

約数の個数: 60

約数和(自身を含む): 142767900

約数和(自身を除く): 61748703

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 137, 147, 149, 189, 411, 441, 447, 567, 959, 1043, 1233, 1323, 1341, 2877, 3129, 3699, 3969, 4023, 6713, 7301, 8631, 9387, 11097, 12069, 20139, 20413, 21903, 25893, 28161, 60417, 61239, 65709, 77679, 84483, 142891, 181251, 183717, 197127, 428673, 543753, 551151, 591381, 1000237, 1286019, 1653453, 3000711, 3858057, 9002133, 11574171, 27006399, 81019197]

約数ペア:

[(1, 81019197), (3, 27006399), (7, 11574171), (9, 9002133), (21, 3858057), (27, 3000711), (49, 1653453), (63, 1286019), (81, 1000237), (137, 591381), (147, 551151), (149, 543753), (189, 428673), (411, 197127), (441, 183717), (447, 181251), (567, 142891), (959, 84483), (1043, 77679), (1233, 65709), (1323, 61239), (1341, 60417), (2877, 28161), (3129, 25893), (3699, 21903), (3969, 20413), (4023, 20139), (6713, 12069), (7301, 11097), (8631, 9387)]