1279481680

素因数分解:

$2^4\times 5^1\times {\mathrm{15993521}}^1$

素因数の和:15993534

約数の個数: 20

約数和(自身を含む): 2974795092

約数和(自身を除く): 1695313412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 15993521, 31987042, 63974084, 79967605, 127948168, 159935210, 255896336, 319870420, 639740840, 1279481680]

約数ペア:

[(1, 1279481680), (2, 639740840), (4, 319870420), (5, 255896336), (8, 159935210), (10, 127948168), (16, 79967605), (20, 63974084), (40, 31987042), (80, 15993521)]