19908880

素因数分解:

$2^4\times 5^1\times {\mathrm{248861}}^1$

素因数の和:248874

約数の個数: 20

約数和(自身を含む): 46288332

約数和(自身を除く): 26379452

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248861, 497722, 995444, 1244305, 1990888, 2488610, 3981776, 4977220, 9954440, 19908880]

約数ペア:

[(1, 19908880), (2, 9954440), (4, 4977220), (5, 3981776), (8, 2488610), (10, 1990888), (16, 1244305), (20, 995444), (40, 497722), (80, 248861)]