989680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:241

約数の個数: 40

約数和(自身を含む): 2343600

約数和(自身を除く): 1353920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 139, 178, 278, 356, 445, 556, 695, 712, 890, 1112, 1390, 1424, 1780, 2224, 2780, 3560, 5560, 7120, 11120, 12371, 24742, 49484, 61855, 98968, 123710, 197936, 247420, 494840, 989680]

約数ペア:

[(1, 989680), (2, 494840), (4, 247420), (5, 197936), (8, 123710), (10, 98968), (16, 61855), (20, 49484), (40, 24742), (80, 12371), (89, 11120), (139, 7120), (178, 5560), (278, 3560), (356, 2780), (445, 2224), (556, 1780), (695, 1424), (712, 1390), (890, 1112)]