19728860

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{4957}}^1$

素因数の和:5165

約数の個数: 24

約数和(自身を含む): 41647200

約数和(自身を除く): 21918340

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 4957, 9914, 19828, 24785, 49570, 99140, 986443, 1972886, 3945772, 4932215, 9864430, 19728860]

約数ペア:

[(1, 19728860), (2, 9864430), (4, 4932215), (5, 3945772), (10, 1972886), (20, 986443), (199, 99140), (398, 49570), (796, 24785), (995, 19828), (1990, 9914), (3980, 4957)]