21158715

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13183}}^1$

素因数の和:13298

約数の個数: 16

約数和(自身を含む): 34172928

約数和(自身を除く): 13014213

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13183, 39549, 65915, 197745, 1410581, 4231743, 7052905, 21158715]

約数ペア:

[(1, 21158715), (3, 7052905), (5, 4231743), (15, 1410581), (107, 197745), (321, 65915), (535, 39549), (1605, 13183)]