20834145

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:191

約数の個数: 64

約数和(自身を含む): 39325440

約数和(自身を除く): 18491295

約数列:

[1, 3, 5, 9, 15, 27, 37, 43, 45, 97, 111, 129, 135, 185, 215, 291, 333, 387, 485, 555, 645, 873, 999, 1161, 1455, 1591, 1665, 1935, 2619, 3589, 4171, 4365, 4773, 4995, 5805, 7955, 10767, 12513, 13095, 14319, 17945, 20855, 23865, 32301, 37539, 42957, 53835, 62565, 71595, 96903, 112617, 154327, 161505, 187695, 214785, 462981, 484515, 563085, 771635, 1388943, 2314905, 4166829, 6944715, 20834145]

約数ペア:

[(1, 20834145), (3, 6944715), (5, 4166829), (9, 2314905), (15, 1388943), (27, 771635), (37, 563085), (43, 484515), (45, 462981), (97, 214785), (111, 187695), (129, 161505), (135, 154327), (185, 112617), (215, 96903), (291, 71595), (333, 62565), (387, 53835), (485, 42957), (555, 37539), (645, 32301), (873, 23865), (999, 20855), (1161, 17945), (1455, 14319), (1591, 13095), (1665, 12513), (1935, 10767), (2619, 7955), (3589, 5805), (4171, 4995), (4365, 4773)]