20681775

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5407}}^1$

素因数の和:5440

約数の個数: 36

約数和(自身を含む): 39229632

約数和(自身を除く): 18547857

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5407, 16221, 27035, 48663, 81105, 91919, 135175, 243315, 275757, 405525, 459595, 827271, 1216575, 1378785, 2297975, 4136355, 6893925, 20681775]

約数ペア:

[(1, 20681775), (3, 6893925), (5, 4136355), (9, 2297975), (15, 1378785), (17, 1216575), (25, 827271), (45, 459595), (51, 405525), (75, 275757), (85, 243315), (153, 135175), (225, 91919), (255, 81105), (425, 48663), (765, 27035), (1275, 16221), (3825, 5407)]