21136778

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{42787}}^1$

素因数の和:42821

約数の個数: 16

約数和(自身を含む): 35941920

約数和(自身を除く): 14805142

約数列:

[1, 2, 13, 19, 26, 38, 247, 494, 42787, 85574, 556231, 812953, 1112462, 1625906, 10568389, 21136778]

約数ペア:

[(1, 21136778), (2, 10568389), (13, 1625906), (19, 1112462), (26, 812953), (38, 556231), (247, 85574), (494, 42787)]