28126251

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{503}}^1$

素因数の和:640

約数の個数: 32

約数和(自身を含む): 44352000

約数和(自身を除く): 16225749

約数列:

[1, 3, 9, 19, 27, 57, 109, 171, 327, 503, 513, 981, 1509, 2071, 2943, 4527, 6213, 9557, 13581, 18639, 28671, 54827, 55917, 86013, 164481, 258039, 493443, 1041713, 1480329, 3125139, 9375417, 28126251]

約数ペア:

[(1, 28126251), (3, 9375417), (9, 3125139), (19, 1480329), (27, 1041713), (57, 493443), (109, 258039), (171, 164481), (327, 86013), (503, 55917), (513, 54827), (981, 28671), (1509, 18639), (2071, 13581), (2943, 9557), (4527, 6213)]