21281940

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1$

素因数の和:204

約数の個数: 144

約数和(自身を含む): 69713280

約数和(自身を除く): 48431340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 29, 30, 36, 45, 54, 58, 60, 81, 87, 90, 108, 116, 135, 145, 151, 162, 174, 180, 243, 261, 270, 290, 302, 324, 348, 405, 435, 453, 486, 522, 540, 580, 604, 755, 783, 810, 870, 906, 972, 1044, 1215, 1305, 1359, 1510, 1566, 1620, 1740, 1812, 2265, 2349, 2430, 2610, 2718, 3020, 3132, 3915, 4077, 4379, 4530, 4698, 4860, 5220, 5436, 6795, 7047, 7830, 8154, 8758, 9060, 9396, 11745, 12231, 13137, 13590, 14094, 15660, 16308, 17516, 20385, 21895, 23490, 24462, 26274, 27180, 28188, 35235, 36693, 39411, 40770, 43790, 46980, 48924, 52548, 61155, 65685, 70470, 73386, 78822, 81540, 87580, 118233, 122310, 131370, 140940, 146772, 157644, 183465, 197055, 236466, 244620, 262740, 354699, 366930, 394110, 472932, 591165, 709398, 733860, 788220, 1064097, 1182330, 1418796, 1773495, 2128194, 2364660, 3546990, 4256388, 5320485, 7093980, 10640970, 21281940]

約数ペア:

[(1, 21281940), (2, 10640970), (3, 7093980), (4, 5320485), (5, 4256388), (6, 3546990), (9, 2364660), (10, 2128194), (12, 1773495), (15, 1418796), (18, 1182330), (20, 1064097), (27, 788220), (29, 733860), (30, 709398), (36, 591165), (45, 472932), (54, 394110), (58, 366930), (60, 354699), (81, 262740), (87, 244620), (90, 236466), (108, 197055), (116, 183465), (135, 157644), (145, 146772), (151, 140940), (162, 131370), (174, 122310), (180, 118233), (243, 87580), (261, 81540), (270, 78822), (290, 73386), (302, 70470), (324, 65685), (348, 61155), (405, 52548), (435, 48924), (453, 46980), (486, 43790), (522, 40770), (540, 39411), (580, 36693), (604, 35235), (755, 28188), (783, 27180), (810, 26274), (870, 24462), (906, 23490), (972, 21895), (1044, 20385), (1215, 17516), (1305, 16308), (1359, 15660), (1510, 14094), (1566, 13590), (1620, 13137), (1740, 12231), (1812, 11745), (2265, 9396), (2349, 9060), (2430, 8758), (2610, 8154), (2718, 7830), (3020, 7047), (3132, 6795), (3915, 5436), (4077, 5220), (4379, 4860), (4530, 4698)]