21184905

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:119

約数の個数: 96

約数和(自身を含む): 43666560

約数和(自身を除く): 22481655

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 37, 41, 49, 57, 95, 105, 111, 123, 133, 147, 185, 205, 245, 259, 285, 287, 399, 555, 615, 665, 703, 735, 777, 779, 861, 931, 1295, 1435, 1517, 1813, 1995, 2009, 2109, 2337, 2793, 3515, 3885, 3895, 4305, 4551, 4655, 4921, 5439, 5453, 6027, 7585, 9065, 10045, 10545, 10619, 11685, 13965, 14763, 16359, 22755, 24605, 27195, 27265, 28823, 30135, 31857, 34447, 38171, 53095, 73815, 74333, 81795, 86469, 103341, 114513, 144115, 159285, 172235, 190855, 201761, 222999, 371665, 432345, 516705, 572565, 605283, 1008805, 1114995, 1412327, 3026415, 4236981, 7061635, 21184905]

約数ペア:

[(1, 21184905), (3, 7061635), (5, 4236981), (7, 3026415), (15, 1412327), (19, 1114995), (21, 1008805), (35, 605283), (37, 572565), (41, 516705), (49, 432345), (57, 371665), (95, 222999), (105, 201761), (111, 190855), (123, 172235), (133, 159285), (147, 144115), (185, 114513), (205, 103341), (245, 86469), (259, 81795), (285, 74333), (287, 73815), (399, 53095), (555, 38171), (615, 34447), (665, 31857), (703, 30135), (735, 28823), (777, 27265), (779, 27195), (861, 24605), (931, 22755), (1295, 16359), (1435, 14763), (1517, 13965), (1813, 11685), (1995, 10619), (2009, 10545), (2109, 10045), (2337, 9065), (2793, 7585), (3515, 6027), (3885, 5453), (3895, 5439), (4305, 4921), (4551, 4655)]