255736257

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{640943}}^1$

素因数の和:640972

約数の個数: 16

約数和(自身を含む): 410204160

約数和(自身を除く): 154467903

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 640943, 1922829, 4486601, 12177917, 13459803, 36533751, 85245419, 255736257]

約数ペア:

[(1, 255736257), (3, 85245419), (7, 36533751), (19, 13459803), (21, 12177917), (57, 4486601), (133, 1922829), (399, 640943)]