21156660

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{193}}^1$

素因数の和:247

約数の個数: 192

約数和(自身を含む): 78220800

約数和(自身を除く): 57064140

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 29, 30, 35, 36, 42, 45, 54, 58, 60, 63, 70, 84, 87, 90, 105, 108, 116, 126, 135, 140, 145, 174, 180, 189, 193, 203, 210, 252, 261, 270, 290, 315, 348, 378, 386, 406, 420, 435, 522, 540, 579, 580, 609, 630, 756, 772, 783, 812, 870, 945, 965, 1015, 1044, 1158, 1218, 1260, 1305, 1351, 1566, 1737, 1740, 1827, 1890, 1930, 2030, 2316, 2436, 2610, 2702, 2895, 3045, 3132, 3474, 3654, 3780, 3860, 3915, 4053, 4060, 5211, 5220, 5404, 5481, 5597, 5790, 6090, 6755, 6948, 7308, 7830, 8106, 8685, 9135, 10422, 10962, 11194, 11580, 12159, 12180, 13510, 15660, 16212, 16791, 17370, 18270, 20265, 20844, 21924, 22388, 24318, 26055, 27020, 27405, 27985, 33582, 34740, 36477, 36540, 39179, 40530, 48636, 50373, 52110, 54810, 55970, 60795, 67164, 72954, 78358, 81060, 83955, 100746, 104220, 109620, 111940, 117537, 121590, 145908, 151119, 156716, 167910, 182385, 195895, 201492, 235074, 243180, 251865, 302238, 335820, 352611, 364770, 391790, 470148, 503730, 587685, 604476, 705222, 729540, 755595, 783580, 1007460, 1057833, 1175370, 1410444, 1511190, 1763055, 2115666, 2350740, 3022380, 3526110, 4231332, 5289165, 7052220, 10578330, 21156660]

約数ペア:

[(1, 21156660), (2, 10578330), (3, 7052220), (4, 5289165), (5, 4231332), (6, 3526110), (7, 3022380), (9, 2350740), (10, 2115666), (12, 1763055), (14, 1511190), (15, 1410444), (18, 1175370), (20, 1057833), (21, 1007460), (27, 783580), (28, 755595), (29, 729540), (30, 705222), (35, 604476), (36, 587685), (42, 503730), (45, 470148), (54, 391790), (58, 364770), (60, 352611), (63, 335820), (70, 302238), (84, 251865), (87, 243180), (90, 235074), (105, 201492), (108, 195895), (116, 182385), (126, 167910), (135, 156716), (140, 151119), (145, 145908), (174, 121590), (180, 117537), (189, 111940), (193, 109620), (203, 104220), (210, 100746), (252, 83955), (261, 81060), (270, 78358), (290, 72954), (315, 67164), (348, 60795), (378, 55970), (386, 54810), (406, 52110), (420, 50373), (435, 48636), (522, 40530), (540, 39179), (579, 36540), (580, 36477), (609, 34740), (630, 33582), (756, 27985), (772, 27405), (783, 27020), (812, 26055), (870, 24318), (945, 22388), (965, 21924), (1015, 20844), (1044, 20265), (1158, 18270), (1218, 17370), (1260, 16791), (1305, 16212), (1351, 15660), (1566, 13510), (1737, 12180), (1740, 12159), (1827, 11580), (1890, 11194), (1930, 10962), (2030, 10422), (2316, 9135), (2436, 8685), (2610, 8106), (2702, 7830), (2895, 7308), (3045, 6948), (3132, 6755), (3474, 6090), (3654, 5790), (3780, 5597), (3860, 5481), (3915, 5404), (4053, 5220), (4060, 5211)]