21064275

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5507}}^1$

素因数の和:5540

約数の個数: 36

約数和(自身を含む): 39955032

約数和(自身を除く): 18890757

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5507, 16521, 27535, 49563, 82605, 93619, 137675, 247815, 280857, 413025, 468095, 842571, 1239075, 1404285, 2340475, 4212855, 7021425, 21064275]

約数ペア:

[(1, 21064275), (3, 7021425), (5, 4212855), (9, 2340475), (15, 1404285), (17, 1239075), (25, 842571), (45, 468095), (51, 413025), (75, 280857), (85, 247815), (153, 137675), (225, 93619), (255, 82605), (425, 49563), (765, 27535), (1275, 16521), (3825, 5507)]