20661885

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3001}}^1$

素因数の和:3035

約数の個数: 40

約数和(自身を含む): 39230136

約数和(自身を除く): 18568251

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 255, 405, 459, 765, 1377, 2295, 3001, 6885, 9003, 15005, 27009, 45015, 51017, 81027, 135045, 153051, 243081, 255085, 405135, 459153, 765255, 1215405, 1377459, 2295765, 4132377, 6887295, 20661885]

約数ペア:

[(1, 20661885), (3, 6887295), (5, 4132377), (9, 2295765), (15, 1377459), (17, 1215405), (27, 765255), (45, 459153), (51, 405135), (81, 255085), (85, 243081), (135, 153051), (153, 135045), (255, 81027), (405, 51017), (459, 45015), (765, 27009), (1377, 15005), (2295, 9003), (3001, 6885)]