21187869

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{503}}^1\times {\mathrm{739}}^1$

素因数の和:1264

約数の個数: 16

約数和(自身を含む): 29836800

約数和(自身を除く): 8648931

約数列:

[1, 3, 19, 57, 503, 739, 1509, 2217, 9557, 14041, 28671, 42123, 371717, 1115151, 7062623, 21187869]

約数ペア:

[(1, 21187869), (3, 7062623), (19, 1115151), (57, 371717), (503, 42123), (739, 28671), (1509, 14041), (2217, 9557)]