257631

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:262

約数の個数: 16

約数和(自身を含む): 386688

約数和(自身を除く): 129057

約数列:

[1, 3, 11, 33, 37, 111, 211, 407, 633, 1221, 2321, 6963, 7807, 23421, 85877, 257631]

約数ペア:

[(1, 257631), (3, 85877), (11, 23421), (33, 7807), (37, 6963), (111, 2321), (211, 1221), (407, 633)]