12720645

素因数分解:

$3^4\times 5^1\times 7^2\times {\mathrm{641}}^1$

素因数の和:672

約数の個数: 60

約数和(自身を含む): 26567244

約数和(自身を除く): 13846599

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 81, 105, 135, 147, 189, 245, 315, 405, 441, 567, 641, 735, 945, 1323, 1923, 2205, 2835, 3205, 3969, 4487, 5769, 6615, 9615, 13461, 17307, 19845, 22435, 28845, 31409, 40383, 51921, 67305, 86535, 94227, 121149, 157045, 201915, 259605, 282681, 363447, 471135, 605745, 848043, 1413405, 1817235, 2544129, 4240215, 12720645]

約数ペア:

[(1, 12720645), (3, 4240215), (5, 2544129), (7, 1817235), (9, 1413405), (15, 848043), (21, 605745), (27, 471135), (35, 363447), (45, 282681), (49, 259605), (63, 201915), (81, 157045), (105, 121149), (135, 94227), (147, 86535), (189, 67305), (245, 51921), (315, 40383), (405, 31409), (441, 28845), (567, 22435), (641, 19845), (735, 17307), (945, 13461), (1323, 9615), (1923, 6615), (2205, 5769), (2835, 4487), (3205, 3969)]