21186250

素因数分解:

$2^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{997}}^1$

素因数の和:1036

約数の個数: 40

約数和(自身を含む): 42089652

約数和(自身を除く): 20903402

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 125, 170, 250, 425, 625, 850, 997, 1250, 1994, 2125, 4250, 4985, 9970, 10625, 16949, 21250, 24925, 33898, 49850, 84745, 124625, 169490, 249250, 423725, 623125, 847450, 1246250, 2118625, 4237250, 10593125, 21186250]

約数ペア:

[(1, 21186250), (2, 10593125), (5, 4237250), (10, 2118625), (17, 1246250), (25, 847450), (34, 623125), (50, 423725), (85, 249250), (125, 169490), (170, 124625), (250, 84745), (425, 49850), (625, 33898), (850, 24925), (997, 21250), (1250, 16949), (1994, 10625), (2125, 9970), (4250, 4985)]