19890765

素因数分解:

$3^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1$

素因数の和:150

約数の個数: 64

約数和(自身を含む): 38257920

約数和(自身を除く): 18367155

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 107, 135, 153, 243, 255, 321, 405, 459, 535, 729, 765, 963, 1215, 1377, 1605, 1819, 2187, 2295, 2889, 3645, 4131, 4815, 5457, 6885, 8667, 9095, 10935, 12393, 14445, 16371, 20655, 26001, 27285, 37179, 43335, 49113, 61965, 78003, 81855, 130005, 147339, 185895, 234009, 245565, 390015, 442017, 736695, 1170045, 1326051, 2210085, 3978153, 6630255, 19890765]

約数ペア:

[(1, 19890765), (3, 6630255), (5, 3978153), (9, 2210085), (15, 1326051), (17, 1170045), (27, 736695), (45, 442017), (51, 390015), (81, 245565), (85, 234009), (107, 185895), (135, 147339), (153, 130005), (243, 81855), (255, 78003), (321, 61965), (405, 49113), (459, 43335), (535, 37179), (729, 27285), (765, 26001), (963, 20655), (1215, 16371), (1377, 14445), (1605, 12393), (1819, 10935), (2187, 9095), (2295, 8667), (2889, 6885), (3645, 5457), (4131, 4815)]