21149420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{1999}}^1$

素因数の和:2054

約数の個数: 36

約数和(自身を含む): 46452000

約数和(自身を除く): 25302580

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 529, 1058, 1999, 2116, 2645, 3998, 5290, 7996, 9995, 10580, 19990, 39980, 45977, 91954, 183908, 229885, 459770, 919540, 1057471, 2114942, 4229884, 5287355, 10574710, 21149420]

約数ペア:

[(1, 21149420), (2, 10574710), (4, 5287355), (5, 4229884), (10, 2114942), (20, 1057471), (23, 919540), (46, 459770), (92, 229885), (115, 183908), (230, 91954), (460, 45977), (529, 39980), (1058, 19990), (1999, 10580), (2116, 9995), (2645, 7996), (3998, 5290)]