650397940

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{81097}}^1$

素因数の和:81507

約数の個数: 24

約数和(自身を含む): 1369258632

約数和(自身を除く): 718860692

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 81097, 162194, 324388, 405485, 810970, 1621940, 32519897, 65039794, 130079588, 162599485, 325198970, 650397940]

約数ペア:

[(1, 650397940), (2, 325198970), (4, 162599485), (5, 130079588), (10, 65039794), (20, 32519897), (401, 1621940), (802, 810970), (1604, 405485), (2005, 324388), (4010, 162194), (8020, 81097)]