81434540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2663}}^1$

素因数の和:2822

約数の個数: 48

約数和(自身を含む): 187971840

約数和(自身を除く): 106537300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 139, 220, 278, 556, 695, 1390, 1529, 2663, 2780, 3058, 5326, 6116, 7645, 10652, 13315, 15290, 26630, 29293, 30580, 53260, 58586, 117172, 146465, 292930, 370157, 585860, 740314, 1480628, 1850785, 3701570, 4071727, 7403140, 8143454, 16286908, 20358635, 40717270, 81434540]

約数ペア:

[(1, 81434540), (2, 40717270), (4, 20358635), (5, 16286908), (10, 8143454), (11, 7403140), (20, 4071727), (22, 3701570), (44, 1850785), (55, 1480628), (110, 740314), (139, 585860), (220, 370157), (278, 292930), (556, 146465), (695, 117172), (1390, 58586), (1529, 53260), (2663, 30580), (2780, 29293), (3058, 26630), (5326, 15290), (6116, 13315), (7645, 10652)]