20328609

素因数分解:

$3^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 11604831

約数列:

[1, 3, 7, 21, 83, 107, 109, 249, 321, 327, 581, 749, 763, 1743, 2247, 2289, 8881, 9047, 11663, 26643, 27141, 34989, 62167, 63329, 81641, 186501, 189987, 244923, 968029, 2904087, 6776203, 20328609]

約数ペア:

[(1, 20328609), (3, 6776203), (7, 2904087), (21, 968029), (83, 244923), (107, 189987), (109, 186501), (249, 81641), (321, 63329), (327, 62167), (581, 34989), (749, 27141), (763, 26643), (1743, 11663), (2247, 9047), (2289, 8881)]