21206915

素因数分解:

$5^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1\times {\mathrm{373}}^1$

素因数の和:598

約数の個数: 16

約数和(自身を含む): 26012448

約数和(自身を除く): 4805533

約数列:

[1, 5, 83, 137, 373, 415, 685, 1865, 11371, 30959, 51101, 56855, 154795, 255505, 4241383, 21206915]

約数ペア:

[(1, 21206915), (5, 4241383), (83, 255505), (137, 154795), (373, 56855), (415, 51101), (685, 30959), (1865, 11371)]