20687121

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 38825280

約数和(自身を除く): 18138159

約数列:

[1, 3, 7, 9, 13, 21, 29, 39, 63, 67, 87, 91, 117, 169, 201, 203, 261, 273, 377, 469, 507, 603, 609, 819, 871, 1131, 1183, 1407, 1521, 1827, 1943, 2613, 2639, 3393, 3549, 4221, 4901, 5829, 6097, 7839, 7917, 10647, 11323, 13601, 14703, 17487, 18291, 23751, 25259, 33969, 34307, 40803, 44109, 54873, 75777, 79261, 101907, 102921, 122409, 176813, 227331, 237783, 308763, 328367, 530439, 713349, 985101, 1591317, 2298569, 2955303, 6895707, 20687121]

約数ペア:

[(1, 20687121), (3, 6895707), (7, 2955303), (9, 2298569), (13, 1591317), (21, 985101), (29, 713349), (39, 530439), (63, 328367), (67, 308763), (87, 237783), (91, 227331), (117, 176813), (169, 122409), (201, 102921), (203, 101907), (261, 79261), (273, 75777), (377, 54873), (469, 44109), (507, 40803), (603, 34307), (609, 33969), (819, 25259), (871, 23751), (1131, 18291), (1183, 17487), (1407, 14703), (1521, 13601), (1827, 11323), (1943, 10647), (2613, 7917), (2639, 7839), (3393, 6097), (3549, 5829), (4221, 4901)]