20193885

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 16871715

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 109, 115, 179, 207, 327, 345, 537, 545, 895, 981, 1035, 1611, 1635, 2507, 2685, 4117, 4905, 7521, 8055, 12351, 12535, 19511, 20585, 22563, 37053, 37605, 58533, 61755, 97555, 112815, 175599, 185265, 292665, 448753, 877995, 1346259, 2243765, 4038777, 6731295, 20193885]

約数ペア:

[(1, 20193885), (3, 6731295), (5, 4038777), (9, 2243765), (15, 1346259), (23, 877995), (45, 448753), (69, 292665), (109, 185265), (115, 175599), (179, 112815), (207, 97555), (327, 61755), (345, 58533), (537, 37605), (545, 37053), (895, 22563), (981, 20585), (1035, 19511), (1611, 12535), (1635, 12351), (2507, 8055), (2685, 7521), (4117, 4905)]