20642895

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^2$

素因数の和:173

約数の個数: 72

約数和(自身を含む): 44667168

約数和(自身を除く): 24024273

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 71, 91, 105, 117, 195, 213, 273, 315, 355, 455, 497, 585, 639, 819, 923, 1065, 1365, 1491, 2485, 2769, 3195, 4095, 4473, 4615, 5041, 6461, 7455, 8307, 13845, 15123, 19383, 22365, 25205, 32305, 35287, 41535, 45369, 58149, 65533, 75615, 96915, 105861, 176435, 196599, 226845, 290745, 317583, 327665, 458731, 529305, 589797, 982995, 1376193, 1587915, 2293655, 2948985, 4128579, 6880965, 20642895]

約数ペア:

[(1, 20642895), (3, 6880965), (5, 4128579), (7, 2948985), (9, 2293655), (13, 1587915), (15, 1376193), (21, 982995), (35, 589797), (39, 529305), (45, 458731), (63, 327665), (65, 317583), (71, 290745), (91, 226845), (105, 196599), (117, 176435), (195, 105861), (213, 96915), (273, 75615), (315, 65533), (355, 58149), (455, 45369), (497, 41535), (585, 35287), (639, 32305), (819, 25205), (923, 22365), (1065, 19383), (1365, 15123), (1491, 13845), (2485, 8307), (2769, 7455), (3195, 6461), (4095, 5041), (4473, 4615)]