257221168

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{115657}}^1$

素因数の和:115804

約数の個数: 20

約数和(自身を含む): 501955720

約数和(自身を除く): 244734552

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 115657, 231314, 462628, 925256, 1850512, 16076323, 32152646, 64305292, 128610584, 257221168]

約数ペア:

[(1, 257221168), (2, 128610584), (4, 64305292), (8, 32152646), (16, 16076323), (139, 1850512), (278, 925256), (556, 462628), (1112, 231314), (2224, 115657)]