21000798736

素因数分解:

$2^4\times {\mathrm{881}}^1\times {\mathrm{1489841}}^1$

素因数の和:1490730

約数の個数: 20

約数和(自身を含む): 40735259964

約数和(自身を除く): 19734461228

約数列:

[1, 2, 4, 8, 16, 881, 1762, 3524, 7048, 14096, 1489841, 2979682, 5959364, 11918728, 23837456, 1312549921, 2625099842, 5250199684, 10500399368, 21000798736]

約数ペア:

[(1, 21000798736), (2, 10500399368), (4, 5250199684), (8, 2625099842), (16, 1312549921), (881, 23837456), (1762, 11918728), (3524, 5959364), (7048, 2979682), (14096, 1489841)]