21225140

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4759}}^1$

素因数の和:4991

約数の個数: 24

約数和(自身を含む): 44782080

約数和(自身を除く): 23556940

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4759, 9518, 19036, 23795, 47590, 95180, 1061257, 2122514, 4245028, 5306285, 10612570, 21225140]

約数ペア:

[(1, 21225140), (2, 10612570), (4, 5306285), (5, 4245028), (10, 2122514), (20, 1061257), (223, 95180), (446, 47590), (892, 23795), (1115, 19036), (2230, 9518), (4460, 4759)]