21987170

素因数分解:

$2^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{11161}}^1$

素因数の和:11365

約数の個数: 16

約数和(自身を含む): 39781368

約数和(自身を除く): 17794198

約数列:

[1, 2, 5, 10, 197, 394, 985, 1970, 11161, 22322, 55805, 111610, 2198717, 4397434, 10993585, 21987170]

約数ペア:

[(1, 21987170), (2, 10993585), (5, 4397434), (10, 2198717), (197, 111610), (394, 55805), (985, 22322), (1970, 11161)]