21291915

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:527

約数の個数: 32

約数和(自身を含む): 35380800

約数和(自身を除く): 14088885

約数列:

[1, 3, 5, 15, 41, 89, 123, 205, 267, 389, 445, 615, 1167, 1335, 1945, 3649, 5835, 10947, 15949, 18245, 34621, 47847, 54735, 79745, 103863, 173105, 239235, 519315, 1419461, 4258383, 7097305, 21291915]

約数ペア:

[(1, 21291915), (3, 7097305), (5, 4258383), (15, 1419461), (41, 519315), (89, 239235), (123, 173105), (205, 103863), (267, 79745), (389, 54735), (445, 47847), (615, 34621), (1167, 18245), (1335, 15949), (1945, 10947), (3649, 5835)]