21120747

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{179}}^1\times {\mathrm{1063}}^1$

素因数の和:1282

約数の個数: 16

約数和(自身を含む): 29111040

約数和(自身を除く): 7990293

約数列:

[1, 3, 37, 111, 179, 537, 1063, 3189, 6623, 19869, 39331, 117993, 190277, 570831, 7040249, 21120747]

約数ペア:

[(1, 21120747), (3, 7040249), (37, 570831), (111, 190277), (179, 117993), (537, 39331), (1063, 19869), (3189, 6623)]