18916880

素因数分解:

$2^4\times 5^1\times {\mathrm{236461}}^1$

素因数の和:236474

約数の個数: 20

約数和(自身を含む): 43981932

約数和(自身を除く): 25065052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 236461, 472922, 945844, 1182305, 1891688, 2364610, 3783376, 4729220, 9458440, 18916880]

約数ペア:

[(1, 18916880), (2, 9458440), (4, 4729220), (5, 3783376), (8, 2364610), (10, 1891688), (16, 1182305), (20, 945844), (40, 472922), (80, 236461)]