20676945

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 34191360

約数和(自身を除く): 13514415

約数列:

[1, 3, 5, 15, 47, 139, 141, 211, 235, 417, 633, 695, 705, 1055, 2085, 3165, 6533, 9917, 19599, 29329, 29751, 32665, 49585, 87987, 97995, 146645, 148755, 439935, 1378463, 4135389, 6892315, 20676945]

約数ペア:

[(1, 20676945), (3, 6892315), (5, 4135389), (15, 1378463), (47, 439935), (139, 148755), (141, 146645), (211, 97995), (235, 87987), (417, 49585), (633, 32665), (695, 29751), (705, 29329), (1055, 19599), (2085, 9917), (3165, 6533)]