21120195

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13159}}^1$

素因数の和:13274

約数の個数: 16

約数和(自身を含む): 34110720

約数和(自身を除く): 12990525

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13159, 39477, 65795, 197385, 1408013, 4224039, 7040065, 21120195]

約数ペア:

[(1, 21120195), (3, 7040065), (5, 4224039), (15, 1408013), (107, 197385), (321, 65795), (535, 39477), (1605, 13159)]