20156985

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{8783}}^1$

素因数の和:8814

約数の個数: 32

約数和(自身を含む): 37946880

約数和(自身を除く): 17789895

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 8783, 26349, 43915, 79047, 131745, 149311, 237141, 395235, 447933, 746555, 1185705, 1343799, 2239665, 4031397, 6718995, 20156985]

約数ペア:

[(1, 20156985), (3, 6718995), (5, 4031397), (9, 2239665), (15, 1343799), (17, 1185705), (27, 746555), (45, 447933), (51, 395235), (85, 237141), (135, 149311), (153, 131745), (255, 79047), (459, 43915), (765, 26349), (2295, 8783)]