21185391

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{347}}^1\times {\mathrm{433}}^1$

素因数の和:830

約数の個数: 16

約数和(自身を含む): 28998144

約数和(自身を除く): 7812753

約数列:

[1, 3, 47, 141, 347, 433, 1041, 1299, 16309, 20351, 48927, 61053, 150251, 450753, 7061797, 21185391]

約数ペア:

[(1, 21185391), (3, 7061797), (47, 450753), (141, 150251), (347, 61053), (433, 48927), (1041, 20351), (1299, 16309)]