21165075

素因数分解:

$3^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{863}}^1$

素因数の和:988

約数の個数: 36

約数和(自身を含む): 38301120

約数和(自身を除く): 17136045

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 109, 225, 327, 545, 863, 981, 1635, 2589, 2725, 4315, 4905, 7767, 8175, 12945, 21575, 24525, 38835, 64725, 94067, 194175, 282201, 470335, 846603, 1411005, 2351675, 4233015, 7055025, 21165075]

約数ペア:

[(1, 21165075), (3, 7055025), (5, 4233015), (9, 2351675), (15, 1411005), (25, 846603), (45, 470335), (75, 282201), (109, 194175), (225, 94067), (327, 64725), (545, 38835), (863, 24525), (981, 21575), (1635, 12945), (2589, 8175), (2725, 7767), (4315, 4905)]