21012705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1627}}^1$

素因数の和:1686

約数の個数: 48

約数和(自身を含む): 42666624

約数和(自身を除く): 21653919

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1627, 1845, 2583, 4305, 4881, 8135, 11389, 12915, 14643, 24405, 34167, 56945, 66707, 73215, 102501, 170835, 200121, 333535, 466949, 512505, 600363, 1000605, 1400847, 2334745, 3001815, 4202541, 7004235, 21012705]

約数ペア:

[(1, 21012705), (3, 7004235), (5, 4202541), (7, 3001815), (9, 2334745), (15, 1400847), (21, 1000605), (35, 600363), (41, 512505), (45, 466949), (63, 333535), (105, 200121), (123, 170835), (205, 102501), (287, 73215), (315, 66707), (369, 56945), (615, 34167), (861, 24405), (1435, 14643), (1627, 12915), (1845, 11389), (2583, 8135), (4305, 4881)]