19880055

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1999}}^1$

素因数の和:2040

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 19431945

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 1999, 3315, 5997, 9945, 9995, 17991, 25987, 29985, 33983, 77961, 89955, 101949, 129935, 169915, 233883, 305847, 389805, 441779, 509745, 1169415, 1325337, 1529235, 2208895, 3976011, 6626685, 19880055]

約数ペア:

[(1, 19880055), (3, 6626685), (5, 3976011), (9, 2208895), (13, 1529235), (15, 1325337), (17, 1169415), (39, 509745), (45, 441779), (51, 389805), (65, 305847), (85, 233883), (117, 169915), (153, 129935), (195, 101949), (221, 89955), (255, 77961), (585, 33983), (663, 29985), (765, 25987), (1105, 17991), (1989, 9995), (1999, 9945), (3315, 5997)]