19681155

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1979}}^1$

素因数の和:2020

約数の個数: 48

約数和(自身を含む): 38918880

約数和(自身を除く): 19237725

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1979, 1989, 3315, 5937, 9895, 9945, 17811, 25727, 29685, 33643, 77181, 89055, 100929, 128635, 168215, 231543, 302787, 385905, 437359, 504645, 1157715, 1312077, 1513935, 2186795, 3936231, 6560385, 19681155]

約数ペア:

[(1, 19681155), (3, 6560385), (5, 3936231), (9, 2186795), (13, 1513935), (15, 1312077), (17, 1157715), (39, 504645), (45, 437359), (51, 385905), (65, 302787), (85, 231543), (117, 168215), (153, 128635), (195, 100929), (221, 89055), (255, 77181), (585, 33643), (663, 29685), (765, 25727), (1105, 17811), (1979, 9945), (1989, 9895), (3315, 5937)]