21496981240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{541}}^1\times {\mathrm{743}}^1$

素因数の和:1493

約数の個数: 128

約数和(自身を含む): 55745003520

約数和(自身を除く): 34248022280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 191, 280, 382, 541, 743, 764, 955, 1082, 1337, 1486, 1528, 1910, 2164, 2674, 2705, 2972, 3715, 3787, 3820, 4328, 5201, 5348, 5410, 5944, 6685, 7430, 7574, 7640, 10402, 10696, 10820, 13370, 14860, 15148, 18935, 20804, 21640, 26005, 26740, 29720, 30296, 37870, 41608, 52010, 53480, 75740, 103331, 104020, 141913, 151480, 206662, 208040, 283826, 401963, 413324, 516655, 567652, 709565, 723317, 803926, 826648, 993391, 1033310, 1135304, 1419130, 1446634, 1607852, 1986782, 2009815, 2066620, 2813741, 2838260, 2893268, 3215704, 3616585, 3973564, 4019630, 4133240, 4966955, 5627482, 5676520, 5786536, 7233170, 7947128, 8039260, 9933910, 11254964, 14068705, 14466340, 16078520, 19867820, 22509928, 28137410, 28932680, 39735640, 56274820, 76774933, 112549640, 153549866, 307099732, 383874665, 537424531, 614199464, 767749330, 1074849062, 1535498660, 2149698124, 2687122655, 3070997320, 4299396248, 5374245310, 10748490620, 21496981240]

約数ペア:

[(1, 21496981240), (2, 10748490620), (4, 5374245310), (5, 4299396248), (7, 3070997320), (8, 2687122655), (10, 2149698124), (14, 1535498660), (20, 1074849062), (28, 767749330), (35, 614199464), (40, 537424531), (56, 383874665), (70, 307099732), (140, 153549866), (191, 112549640), (280, 76774933), (382, 56274820), (541, 39735640), (743, 28932680), (764, 28137410), (955, 22509928), (1082, 19867820), (1337, 16078520), (1486, 14466340), (1528, 14068705), (1910, 11254964), (2164, 9933910), (2674, 8039260), (2705, 7947128), (2972, 7233170), (3715, 5786536), (3787, 5676520), (3820, 5627482), (4328, 4966955), (5201, 4133240), (5348, 4019630), (5410, 3973564), (5944, 3616585), (6685, 3215704), (7430, 2893268), (7574, 2838260), (7640, 2813741), (10402, 2066620), (10696, 2009815), (10820, 1986782), (13370, 1607852), (14860, 1446634), (15148, 1419130), (18935, 1135304), (20804, 1033310), (21640, 993391), (26005, 826648), (26740, 803926), (29720, 723317), (30296, 709565), (37870, 567652), (41608, 516655), (52010, 413324), (53480, 401963), (75740, 283826), (103331, 208040), (104020, 206662), (141913, 151480)]