21147195

素因数分解:

$3^1\times 5^1\times {\mathrm{647}}^1\times {\mathrm{2179}}^1$

素因数の和:2834

約数の個数: 16

約数和(自身を含む): 33903360

約数和(自身を除く): 12756165

約数列:

[1, 3, 5, 15, 647, 1941, 2179, 3235, 6537, 9705, 10895, 32685, 1409813, 4229439, 7049065, 21147195]

約数ペア:

[(1, 21147195), (3, 7049065), (5, 4229439), (15, 1409813), (647, 32685), (1941, 10895), (2179, 9705), (3235, 6537)]