21015540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1283}}^1$

素因数の和:1318

約数の個数: 144

約数和(自身を含む): 78519168

約数和(自身を除く): 57503628

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 105, 117, 126, 130, 140, 156, 180, 182, 195, 210, 234, 252, 260, 273, 315, 364, 390, 420, 455, 468, 546, 585, 630, 780, 819, 910, 1092, 1170, 1260, 1283, 1365, 1638, 1820, 2340, 2566, 2730, 3276, 3849, 4095, 5132, 5460, 6415, 7698, 8190, 8981, 11547, 12830, 15396, 16380, 16679, 17962, 19245, 23094, 25660, 26943, 33358, 35924, 38490, 44905, 46188, 50037, 53886, 57735, 66716, 76980, 80829, 83395, 89810, 100074, 107772, 115470, 116753, 134715, 150111, 161658, 166790, 179620, 200148, 230940, 233506, 250185, 269430, 300222, 323316, 333580, 350259, 404145, 467012, 500370, 538860, 583765, 600444, 700518, 750555, 808290, 1000740, 1050777, 1167530, 1401036, 1501110, 1616580, 1751295, 2101554, 2335060, 3002220, 3502590, 4203108, 5253885, 7005180, 10507770, 21015540]

約数ペア:

[(1, 21015540), (2, 10507770), (3, 7005180), (4, 5253885), (5, 4203108), (6, 3502590), (7, 3002220), (9, 2335060), (10, 2101554), (12, 1751295), (13, 1616580), (14, 1501110), (15, 1401036), (18, 1167530), (20, 1050777), (21, 1000740), (26, 808290), (28, 750555), (30, 700518), (35, 600444), (36, 583765), (39, 538860), (42, 500370), (45, 467012), (52, 404145), (60, 350259), (63, 333580), (65, 323316), (70, 300222), (78, 269430), (84, 250185), (90, 233506), (91, 230940), (105, 200148), (117, 179620), (126, 166790), (130, 161658), (140, 150111), (156, 134715), (180, 116753), (182, 115470), (195, 107772), (210, 100074), (234, 89810), (252, 83395), (260, 80829), (273, 76980), (315, 66716), (364, 57735), (390, 53886), (420, 50037), (455, 46188), (468, 44905), (546, 38490), (585, 35924), (630, 33358), (780, 26943), (819, 25660), (910, 23094), (1092, 19245), (1170, 17962), (1260, 16679), (1283, 16380), (1365, 15396), (1638, 12830), (1820, 11547), (2340, 8981), (2566, 8190), (2730, 7698), (3276, 6415), (3849, 5460), (4095, 5132)]