256991231

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{677}}^1$

素因数の和:879

約数の個数: 24

約数和(自身を含む): 306694656

約数和(自身を除く): 49703425

約数列:

[1, 7, 49, 61, 127, 427, 677, 889, 2989, 4739, 6223, 7747, 33173, 41297, 54229, 85979, 289079, 379603, 601853, 2023553, 4212971, 5244719, 36713033, 256991231]

約数ペア:

[(1, 256991231), (7, 36713033), (49, 5244719), (61, 4212971), (127, 2023553), (427, 601853), (677, 379603), (889, 289079), (2989, 85979), (4739, 54229), (6223, 41297), (7747, 33173)]