20789895

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{613}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 42439680

約数和(自身を除く): 21649785

約数列:

[1, 3, 5, 7, 15, 17, 19, 21, 35, 51, 57, 85, 95, 105, 119, 133, 255, 285, 323, 357, 399, 595, 613, 665, 969, 1615, 1785, 1839, 1995, 2261, 3065, 4291, 4845, 6783, 9195, 10421, 11305, 11647, 12873, 21455, 31263, 33915, 34941, 52105, 58235, 64365, 72947, 81529, 156315, 174705, 197999, 218841, 244587, 364735, 407645, 593997, 989995, 1094205, 1222935, 1385993, 2969985, 4157979, 6929965, 20789895]

約数ペア:

[(1, 20789895), (3, 6929965), (5, 4157979), (7, 2969985), (15, 1385993), (17, 1222935), (19, 1094205), (21, 989995), (35, 593997), (51, 407645), (57, 364735), (85, 244587), (95, 218841), (105, 197999), (119, 174705), (133, 156315), (255, 81529), (285, 72947), (323, 64365), (357, 58235), (399, 52105), (595, 34941), (613, 33915), (665, 31263), (969, 21455), (1615, 12873), (1785, 11647), (1839, 11305), (1995, 10421), (2261, 9195), (3065, 6783), (4291, 4845)]