21153700

素因数分解:

$2^2\times 5^2\times {\mathrm{199}}^1\times {\mathrm{1063}}^1$

素因数の和:1276

約数の個数: 36

約数和(自身を含む): 46177600

約数和(自身を除く): 25023900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199, 398, 796, 995, 1063, 1990, 2126, 3980, 4252, 4975, 5315, 9950, 10630, 19900, 21260, 26575, 53150, 106300, 211537, 423074, 846148, 1057685, 2115370, 4230740, 5288425, 10576850, 21153700]

約数ペア:

[(1, 21153700), (2, 10576850), (4, 5288425), (5, 4230740), (10, 2115370), (20, 1057685), (25, 846148), (50, 423074), (100, 211537), (199, 106300), (398, 53150), (796, 26575), (995, 21260), (1063, 19900), (1990, 10630), (2126, 9950), (3980, 5315), (4252, 4975)]