243647540

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{87643}}^1$

素因数の和:87791

約数の個数: 24

約数和(自身を含む): 515346720

約数和(自身を除く): 271699180

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 87643, 175286, 350572, 438215, 876430, 1752860, 12182377, 24364754, 48729508, 60911885, 121823770, 243647540]

約数ペア:

[(1, 243647540), (2, 121823770), (4, 60911885), (5, 48729508), (10, 24364754), (20, 12182377), (139, 1752860), (278, 876430), (556, 438215), (695, 350572), (1390, 175286), (2780, 87643)]