20399895

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4159}}^1$

素因数の和:4279

約数の個数: 24

約数和(自身を含む): 35692800

約数和(自身を除く): 15292905

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4159, 4905, 12477, 20795, 37431, 62385, 187155, 453331, 1359993, 2266655, 4079979, 6799965, 20399895]

約数ペア:

[(1, 20399895), (3, 6799965), (5, 4079979), (9, 2266655), (15, 1359993), (45, 453331), (109, 187155), (327, 62385), (545, 37431), (981, 20795), (1635, 12477), (4159, 4905)]