21000370

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5237}}^1$

素因数の和:5645

約数の個数: 16

約数和(自身を含む): 37902168

約数和(自身を除く): 16901798

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5237, 10474, 26185, 52370, 2100037, 4200074, 10500185, 21000370]

約数ペア:

[(1, 21000370), (2, 10500185), (5, 4200074), (10, 2100037), (401, 52370), (802, 26185), (2005, 10474), (4010, 5237)]