20897775

素因数分解:

$3^2\times 5^2\times {\mathrm{131}}^1\times {\mathrm{709}}^1$

素因数の和:856

約数の個数: 36

約数和(自身を含む): 37769160

約数和(自身を除く): 16871385

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 131, 225, 393, 655, 709, 1179, 1965, 2127, 3275, 3545, 5895, 6381, 9825, 10635, 17725, 29475, 31905, 53175, 92879, 159525, 278637, 464395, 835911, 1393185, 2321975, 4179555, 6965925, 20897775]

約数ペア:

[(1, 20897775), (3, 6965925), (5, 4179555), (9, 2321975), (15, 1393185), (25, 835911), (45, 464395), (75, 278637), (131, 159525), (225, 92879), (393, 53175), (655, 31905), (709, 29475), (1179, 17725), (1965, 10635), (2127, 9825), (3275, 6381), (3545, 5895)]