20815621

素因数分解:

${\mathrm{19}}^2\times {\mathrm{23}}^2\times {\mathrm{109}}^1$

素因数の和:193

約数の個数: 18

約数和(自身を含む): 23176230

約数和(自身を除く): 2360609

約数列:

[1, 19, 23, 109, 361, 437, 529, 2071, 2507, 8303, 10051, 39349, 47633, 57661, 190969, 905027, 1095559, 20815621]

約数ペア:

[(1, 20815621), (19, 1095559), (23, 905027), (109, 190969), (361, 57661), (437, 47633), (529, 39349), (2071, 10051), (2507, 8303)]