1220420

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:587

約数の個数: 24

約数和(自身を含む): 2587200

約数和(自身を除く): 1366780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 439, 556, 695, 878, 1390, 1756, 2195, 2780, 4390, 8780, 61021, 122042, 244084, 305105, 610210, 1220420]

約数ペア:

[(1, 1220420), (2, 610210), (4, 305105), (5, 244084), (10, 122042), (20, 61021), (139, 8780), (278, 4390), (439, 2780), (556, 2195), (695, 1756), (878, 1390)]