494840

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 1134000

約数和(自身を除く): 639160

約数列:

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

約数ペア:

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