21287397

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{5821}}^1$

素因数の和:5900

約数の個数: 16

約数和(自身を含む): 30181248

約数和(自身を除く): 8893851

約数列:

[1, 3, 23, 53, 69, 159, 1219, 3657, 5821, 17463, 133883, 308513, 401649, 925539, 7095799, 21287397]

約数ペア:

[(1, 21287397), (3, 7095799), (23, 925539), (53, 401649), (69, 308513), (159, 133883), (1219, 17463), (3657, 5821)]