199971261

素因数分解:

$3^6\times 7^1\times {\mathrm{149}}^1\times {\mathrm{263}}^1$

素因数の和:437

約数の個数: 56

約数和(自身を含む): 346262400

約数和(自身を除く): 146291139

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 149, 189, 243, 263, 447, 567, 729, 789, 1043, 1341, 1701, 1841, 2367, 3129, 4023, 5103, 5523, 7101, 9387, 12069, 16569, 21303, 28161, 36207, 39187, 49707, 63909, 84483, 108621, 117561, 149121, 191727, 253449, 274309, 352683, 447363, 760347, 822927, 1058049, 1342089, 2468781, 3174147, 7406343, 9522441, 22219029, 28567323, 66657087, 199971261]

約数ペア:

[(1, 199971261), (3, 66657087), (7, 28567323), (9, 22219029), (21, 9522441), (27, 7406343), (63, 3174147), (81, 2468781), (149, 1342089), (189, 1058049), (243, 822927), (263, 760347), (447, 447363), (567, 352683), (729, 274309), (789, 253449), (1043, 191727), (1341, 149121), (1701, 117561), (1841, 108621), (2367, 84483), (3129, 63909), (4023, 49707), (5103, 39187), (5523, 36207), (7101, 28161), (9387, 21303), (12069, 16569)]