21378731

素因数分解:

${\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1\times {\mathrm{211}}^1$

素因数の和:434

約数の個数: 16

約数和(自身を含む): 23974656

約数和(自身を除く): 2595925

約数列:

[1, 11, 61, 151, 211, 671, 1661, 2321, 9211, 12871, 31861, 101321, 141581, 350471, 1943521, 21378731]

約数ペア:

[(1, 21378731), (11, 1943521), (61, 350471), (151, 141581), (211, 101321), (671, 31861), (1661, 12871), (2321, 9211)]