256188920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{492671}}^1$

素因数の和:492695

約数の個数: 32

約数和(自身を含む): 620766720

約数和(自身を除く): 364577800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 492671, 985342, 1970684, 2463355, 3941368, 4926710, 6404723, 9853420, 12809446, 19706840, 25618892, 32023615, 51237784, 64047230, 128094460, 256188920]

約数ペア:

[(1, 256188920), (2, 128094460), (4, 64047230), (5, 51237784), (8, 32023615), (10, 25618892), (13, 19706840), (20, 12809446), (26, 9853420), (40, 6404723), (52, 4926710), (65, 3941368), (104, 2463355), (130, 1970684), (260, 985342), (520, 492671)]