21216495

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13219}}^1$

素因数の和:13334

約数の個数: 16

約数和(自身を含む): 34266240

約数和(自身を除く): 13049745

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13219, 39657, 66095, 198285, 1414433, 4243299, 7072165, 21216495]

約数ペア:

[(1, 21216495), (3, 7072165), (5, 4243299), (15, 1414433), (107, 198285), (321, 66095), (535, 39657), (1605, 13219)]