19972785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:202

約数の個数: 64

約数和(自身を含む): 38610432

約数和(自身を除く): 18637647

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 53, 97, 105, 111, 159, 185, 259, 265, 291, 371, 485, 555, 679, 777, 795, 1113, 1295, 1455, 1855, 1961, 2037, 3395, 3589, 3885, 5141, 5565, 5883, 9805, 10185, 10767, 13727, 15423, 17945, 25123, 25705, 29415, 35987, 41181, 53835, 68635, 75369, 77115, 107961, 125615, 179935, 190217, 205905, 376845, 539805, 570651, 951085, 1331519, 2853255, 3994557, 6657595, 19972785]

約数ペア:

[(1, 19972785), (3, 6657595), (5, 3994557), (7, 2853255), (15, 1331519), (21, 951085), (35, 570651), (37, 539805), (53, 376845), (97, 205905), (105, 190217), (111, 179935), (159, 125615), (185, 107961), (259, 77115), (265, 75369), (291, 68635), (371, 53835), (485, 41181), (555, 35987), (679, 29415), (777, 25705), (795, 25123), (1113, 17945), (1295, 15423), (1455, 13727), (1855, 10767), (1961, 10185), (2037, 9805), (3395, 5883), (3589, 5565), (3885, 5141)]