21157920

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{2099}}^1$

素因数の和:2127

約数の個数: 144

約数和(自身を含む): 82555200

約数和(自身を除く): 61397280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 210, 224, 240, 252, 280, 288, 315, 336, 360, 420, 480, 504, 560, 630, 672, 720, 840, 1008, 1120, 1260, 1440, 1680, 2016, 2099, 2520, 3360, 4198, 5040, 6297, 8396, 10080, 10495, 12594, 14693, 16792, 18891, 20990, 25188, 29386, 31485, 33584, 37782, 41980, 44079, 50376, 58772, 62970, 67168, 73465, 75564, 83960, 88158, 94455, 100752, 117544, 125940, 132237, 146930, 151128, 167920, 176316, 188910, 201504, 220395, 235088, 251880, 264474, 293860, 302256, 335840, 352632, 377820, 440790, 470176, 503760, 528948, 587720, 604512, 661185, 705264, 755640, 881580, 1007520, 1057896, 1175440, 1322370, 1410528, 1511280, 1763160, 2115792, 2350880, 2644740, 3022560, 3526320, 4231584, 5289480, 7052640, 10578960, 21157920]

約数ペア:

[(1, 21157920), (2, 10578960), (3, 7052640), (4, 5289480), (5, 4231584), (6, 3526320), (7, 3022560), (8, 2644740), (9, 2350880), (10, 2115792), (12, 1763160), (14, 1511280), (15, 1410528), (16, 1322370), (18, 1175440), (20, 1057896), (21, 1007520), (24, 881580), (28, 755640), (30, 705264), (32, 661185), (35, 604512), (36, 587720), (40, 528948), (42, 503760), (45, 470176), (48, 440790), (56, 377820), (60, 352632), (63, 335840), (70, 302256), (72, 293860), (80, 264474), (84, 251880), (90, 235088), (96, 220395), (105, 201504), (112, 188910), (120, 176316), (126, 167920), (140, 151128), (144, 146930), (160, 132237), (168, 125940), (180, 117544), (210, 100752), (224, 94455), (240, 88158), (252, 83960), (280, 75564), (288, 73465), (315, 67168), (336, 62970), (360, 58772), (420, 50376), (480, 44079), (504, 41980), (560, 37782), (630, 33584), (672, 31485), (720, 29386), (840, 25188), (1008, 20990), (1120, 18891), (1260, 16792), (1440, 14693), (1680, 12594), (2016, 10495), (2099, 10080), (2520, 8396), (3360, 6297), (4198, 5040)]