257291271

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{21067}}^1$

素因数の和:21155

約数の個数: 24

約数和(自身を含む): 394392960

約数和(自身を除く): 137101689

約数列:

[1, 3, 9, 23, 59, 69, 177, 207, 531, 1357, 4071, 12213, 21067, 63201, 189603, 484541, 1242953, 1453623, 3728859, 4360869, 11186577, 28587919, 85763757, 257291271]

約数ペア:

[(1, 257291271), (3, 85763757), (9, 28587919), (23, 11186577), (59, 4360869), (69, 3728859), (177, 1453623), (207, 1242953), (531, 484541), (1357, 189603), (4071, 63201), (12213, 21067)]