247420

素因数分解:

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

素因数の和:237

約数の個数: 24

約数和(自身を含む): 529200

約数和(自身を除く): 281780

約数列:

[1, 2, 4, 5, 10, 20, 89, 139, 178, 278, 356, 445, 556, 695, 890, 1390, 1780, 2780, 12371, 24742, 49484, 61855, 123710, 247420]

約数ペア:

[(1, 247420), (2, 123710), (4, 61855), (5, 49484), (10, 24742), (20, 12371), (89, 2780), (139, 1780), (178, 1390), (278, 890), (356, 695), (445, 556)]