21955945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{617}}^1\times {\mathrm{647}}^1$

素因数の和:1280

約数の個数: 16

約数和(自身を含む): 28833408

約数和(自身を除く): 6877463

約数列:

[1, 5, 11, 55, 617, 647, 3085, 3235, 6787, 7117, 33935, 35585, 399199, 1995995, 4391189, 21955945]

約数ペア:

[(1, 21955945), (5, 4391189), (11, 1995995), (55, 399199), (617, 35585), (647, 33935), (3085, 7117), (3235, 6787)]