21280532

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:241

約数の個数: 96

約数和(自身を含む): 51367680

約数和(自身を除く): 30087148

約数列:

[1, 2, 4, 7, 13, 14, 17, 19, 26, 28, 34, 38, 52, 68, 76, 91, 119, 133, 181, 182, 221, 238, 247, 266, 323, 362, 364, 442, 476, 494, 532, 646, 724, 884, 988, 1267, 1292, 1547, 1729, 2261, 2353, 2534, 3077, 3094, 3439, 3458, 4199, 4522, 4706, 5068, 6154, 6188, 6878, 6916, 8398, 9044, 9412, 12308, 13756, 16471, 16796, 21539, 24073, 29393, 32942, 40001, 43078, 44707, 48146, 58463, 58786, 65884, 80002, 86156, 89414, 96292, 116926, 117572, 160004, 178828, 233852, 280007, 312949, 409241, 560014, 625898, 760019, 818482, 1120028, 1251796, 1520038, 1636964, 3040076, 5320133, 10640266, 21280532]

約数ペア:

[(1, 21280532), (2, 10640266), (4, 5320133), (7, 3040076), (13, 1636964), (14, 1520038), (17, 1251796), (19, 1120028), (26, 818482), (28, 760019), (34, 625898), (38, 560014), (52, 409241), (68, 312949), (76, 280007), (91, 233852), (119, 178828), (133, 160004), (181, 117572), (182, 116926), (221, 96292), (238, 89414), (247, 86156), (266, 80002), (323, 65884), (362, 58786), (364, 58463), (442, 48146), (476, 44707), (494, 43078), (532, 40001), (646, 32942), (724, 29393), (884, 24073), (988, 21539), (1267, 16796), (1292, 16471), (1547, 13756), (1729, 12308), (2261, 9412), (2353, 9044), (2534, 8398), (3077, 6916), (3094, 6878), (3439, 6188), (3458, 6154), (4199, 5068), (4522, 4706)]