20215440

素因数分解:

$2^4\times 3^3\times 5^1\times 7^2\times {\mathrm{191}}^1$

素因数の和:227

約数の個数: 240

約数和(自身を含む): 81423360

約数和(自身を除く): 61207920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 49, 54, 56, 60, 63, 70, 72, 80, 84, 90, 98, 105, 108, 112, 120, 126, 135, 140, 144, 147, 168, 180, 189, 191, 196, 210, 216, 240, 245, 252, 270, 280, 294, 315, 336, 360, 378, 382, 392, 420, 432, 441, 490, 504, 540, 560, 573, 588, 630, 720, 735, 756, 764, 784, 840, 882, 945, 955, 980, 1008, 1080, 1146, 1176, 1260, 1323, 1337, 1470, 1512, 1528, 1680, 1719, 1764, 1890, 1910, 1960, 2160, 2205, 2292, 2352, 2520, 2646, 2674, 2865, 2940, 3024, 3056, 3438, 3528, 3780, 3820, 3920, 4011, 4410, 4584, 5040, 5157, 5292, 5348, 5730, 5880, 6615, 6685, 6876, 7056, 7560, 7640, 8022, 8595, 8820, 9168, 9359, 10314, 10584, 10696, 11460, 11760, 12033, 13230, 13370, 13752, 15120, 15280, 16044, 17190, 17640, 18718, 20055, 20628, 21168, 21392, 22920, 24066, 25785, 26460, 26740, 27504, 28077, 32088, 34380, 35280, 36099, 37436, 40110, 41256, 45840, 46795, 48132, 51570, 52920, 53480, 56154, 60165, 64176, 68760, 72198, 74872, 80220, 82512, 84231, 93590, 96264, 103140, 105840, 106960, 112308, 120330, 137520, 140385, 144396, 149744, 160440, 168462, 180495, 187180, 192528, 206280, 224616, 240660, 252693, 280770, 288792, 320880, 336924, 360990, 374360, 412560, 421155, 449232, 481320, 505386, 561540, 577584, 673848, 721980, 748720, 842310, 962640, 1010772, 1123080, 1263465, 1347696, 1443960, 1684620, 2021544, 2246160, 2526930, 2887920, 3369240, 4043088, 5053860, 6738480, 10107720, 20215440]

約数ペア:

[(1, 20215440), (2, 10107720), (3, 6738480), (4, 5053860), (5, 4043088), (6, 3369240), (7, 2887920), (8, 2526930), (9, 2246160), (10, 2021544), (12, 1684620), (14, 1443960), (15, 1347696), (16, 1263465), (18, 1123080), (20, 1010772), (21, 962640), (24, 842310), (27, 748720), (28, 721980), (30, 673848), (35, 577584), (36, 561540), (40, 505386), (42, 481320), (45, 449232), (48, 421155), (49, 412560), (54, 374360), (56, 360990), (60, 336924), (63, 320880), (70, 288792), (72, 280770), (80, 252693), (84, 240660), (90, 224616), (98, 206280), (105, 192528), (108, 187180), (112, 180495), (120, 168462), (126, 160440), (135, 149744), (140, 144396), (144, 140385), (147, 137520), (168, 120330), (180, 112308), (189, 106960), (191, 105840), (196, 103140), (210, 96264), (216, 93590), (240, 84231), (245, 82512), (252, 80220), (270, 74872), (280, 72198), (294, 68760), (315, 64176), (336, 60165), (360, 56154), (378, 53480), (382, 52920), (392, 51570), (420, 48132), (432, 46795), (441, 45840), (490, 41256), (504, 40110), (540, 37436), (560, 36099), (573, 35280), (588, 34380), (630, 32088), (720, 28077), (735, 27504), (756, 26740), (764, 26460), (784, 25785), (840, 24066), (882, 22920), (945, 21392), (955, 21168), (980, 20628), (1008, 20055), (1080, 18718), (1146, 17640), (1176, 17190), (1260, 16044), (1323, 15280), (1337, 15120), (1470, 13752), (1512, 13370), (1528, 13230), (1680, 12033), (1719, 11760), (1764, 11460), (1890, 10696), (1910, 10584), (1960, 10314), (2160, 9359), (2205, 9168), (2292, 8820), (2352, 8595), (2520, 8022), (2646, 7640), (2674, 7560), (2865, 7056), (2940, 6876), (3024, 6685), (3056, 6615), (3438, 5880), (3528, 5730), (3780, 5348), (3820, 5292), (3920, 5157), (4011, 5040), (4410, 4584)]