42920420

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{15439}}^1$

素因数の和:15587

約数の個数: 24

約数和(自身を含む): 90787200

約数和(自身を除く): 47866780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 15439, 30878, 61756, 77195, 154390, 308780, 2146021, 4292042, 8584084, 10730105, 21460210, 42920420]

約数ペア:

[(1, 42920420), (2, 21460210), (4, 10730105), (5, 8584084), (10, 4292042), (20, 2146021), (139, 308780), (278, 154390), (556, 77195), (695, 61756), (1390, 30878), (2780, 15439)]