21388640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{113}}^1$

素因数の和:161

約数の個数: 144

約数和(自身を含む): 63086688

約数和(自身を除く): 41698048

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 113, 130, 140, 160, 169, 182, 208, 224, 226, 260, 280, 338, 364, 416, 452, 455, 520, 560, 565, 676, 728, 791, 845, 904, 910, 1040, 1120, 1130, 1183, 1352, 1456, 1469, 1582, 1690, 1808, 1820, 2080, 2260, 2366, 2704, 2912, 2938, 3164, 3380, 3616, 3640, 3955, 4520, 4732, 5408, 5876, 5915, 6328, 6760, 7280, 7345, 7910, 9040, 9464, 10283, 11752, 11830, 12656, 13520, 14560, 14690, 15820, 18080, 18928, 19097, 20566, 23504, 23660, 25312, 27040, 29380, 31640, 37856, 38194, 41132, 47008, 47320, 51415, 58760, 63280, 76388, 82264, 94640, 95485, 102830, 117520, 126560, 133679, 152776, 164528, 189280, 190970, 205660, 235040, 267358, 305552, 329056, 381940, 411320, 534716, 611104, 668395, 763880, 822640, 1069432, 1336790, 1527760, 1645280, 2138864, 2673580, 3055520, 4277728, 5347160, 10694320, 21388640]

約数ペア:

[(1, 21388640), (2, 10694320), (4, 5347160), (5, 4277728), (7, 3055520), (8, 2673580), (10, 2138864), (13, 1645280), (14, 1527760), (16, 1336790), (20, 1069432), (26, 822640), (28, 763880), (32, 668395), (35, 611104), (40, 534716), (52, 411320), (56, 381940), (65, 329056), (70, 305552), (80, 267358), (91, 235040), (104, 205660), (112, 190970), (113, 189280), (130, 164528), (140, 152776), (160, 133679), (169, 126560), (182, 117520), (208, 102830), (224, 95485), (226, 94640), (260, 82264), (280, 76388), (338, 63280), (364, 58760), (416, 51415), (452, 47320), (455, 47008), (520, 41132), (560, 38194), (565, 37856), (676, 31640), (728, 29380), (791, 27040), (845, 25312), (904, 23660), (910, 23504), (1040, 20566), (1120, 19097), (1130, 18928), (1183, 18080), (1352, 15820), (1456, 14690), (1469, 14560), (1582, 13520), (1690, 12656), (1808, 11830), (1820, 11752), (2080, 10283), (2260, 9464), (2366, 9040), (2704, 7910), (2912, 7345), (2938, 7280), (3164, 6760), (3380, 6328), (3616, 5915), (3640, 5876), (3955, 5408), (4520, 4732)]