21891519

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1327}}^1$

素因数の和:1396

約数の個数: 32

約数和(自身を含む): 35696640

約数和(自身を除く): 13805121

約数列:

[1, 3, 9, 13, 27, 39, 47, 117, 141, 351, 423, 611, 1269, 1327, 1833, 3981, 5499, 11943, 16497, 17251, 35829, 51753, 62369, 155259, 187107, 465777, 561321, 810797, 1683963, 2432391, 7297173, 21891519]

約数ペア:

[(1, 21891519), (3, 7297173), (9, 2432391), (13, 1683963), (27, 810797), (39, 561321), (47, 465777), (117, 187107), (141, 155259), (351, 62369), (423, 51753), (611, 35829), (1269, 17251), (1327, 16497), (1833, 11943), (3981, 5499)]