257441378

素因数分解:

$2^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{19997}}^1$

素因数の和:20197

約数の個数: 16

約数和(自身を含む): 398120184

約数和(自身を除く): 140678806

約数列:

[1, 2, 41, 82, 157, 314, 6437, 12874, 19997, 39994, 819877, 1639754, 3139529, 6279058, 128720689, 257441378]

約数ペア:

[(1, 257441378), (2, 128720689), (41, 6279058), (82, 3139529), (157, 1639754), (314, 819877), (6437, 39994), (12874, 19997)]