21054975

素因数分解:

$3^1\times 5^2\times {\mathrm{131}}^1\times {\mathrm{2143}}^1$

素因数の和:2287

約数の個数: 24

約数和(自身を含む): 35092992

約数和(自身を除く): 14038017

約数列:

[1, 3, 5, 15, 25, 75, 131, 393, 655, 1965, 2143, 3275, 6429, 9825, 10715, 32145, 53575, 160725, 280733, 842199, 1403665, 4210995, 7018325, 21054975]

約数ペア:

[(1, 21054975), (3, 7018325), (5, 4210995), (15, 1403665), (25, 842199), (75, 280733), (131, 160725), (393, 53575), (655, 32145), (1965, 10715), (2143, 9825), (3275, 6429)]