21000724767

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{47809}}^1$

素因数の和:47878

約数の個数: 80

約数和(自身を含む): 37486864800

約数和(自身を除く): 16486140033

約数列:

[1, 3, 9, 11, 17, 27, 29, 33, 51, 81, 87, 99, 153, 187, 261, 297, 319, 459, 493, 561, 783, 891, 957, 1377, 1479, 1683, 2349, 2871, 4437, 5049, 5423, 8613, 13311, 15147, 16269, 25839, 39933, 47809, 48807, 143427, 146421, 430281, 439263, 525899, 812753, 1290843, 1386461, 1577697, 2438259, 3872529, 4159383, 4733091, 7314777, 8940283, 12478149, 14199273, 15251071, 21944331, 23569837, 26820849, 37434447, 42597819, 45753213, 65832993, 70709511, 80462547, 112303341, 137259639, 212128533, 241387641, 259268207, 411778917, 636385599, 724162923, 777804621, 1235336751, 1909156797, 2333413863, 7000241589, 21000724767]

約数ペア:

[(1, 21000724767), (3, 7000241589), (9, 2333413863), (11, 1909156797), (17, 1235336751), (27, 777804621), (29, 724162923), (33, 636385599), (51, 411778917), (81, 259268207), (87, 241387641), (99, 212128533), (153, 137259639), (187, 112303341), (261, 80462547), (297, 70709511), (319, 65832993), (459, 45753213), (493, 42597819), (561, 37434447), (783, 26820849), (891, 23569837), (957, 21944331), (1377, 15251071), (1479, 14199273), (1683, 12478149), (2349, 8940283), (2871, 7314777), (4437, 4733091), (5049, 4159383), (5423, 3872529), (8613, 2438259), (13311, 1577697), (15147, 1386461), (16269, 1290843), (25839, 812753), (39933, 525899), (47809, 439263), (48807, 430281), (143427, 146421)]