20402780

素因数分解:

$2^2\times 5^1\times {\mathrm{743}}^1\times {\mathrm{1373}}^1$

素因数の和:2125

約数の個数: 24

約数和(自身を含む): 42934752

約数和(自身を除く): 22531972

約数列:

[1, 2, 4, 5, 10, 20, 743, 1373, 1486, 2746, 2972, 3715, 5492, 6865, 7430, 13730, 14860, 27460, 1020139, 2040278, 4080556, 5100695, 10201390, 20402780]

約数ペア:

[(1, 20402780), (2, 10201390), (4, 5100695), (5, 4080556), (10, 2040278), (20, 1020139), (743, 27460), (1373, 14860), (1486, 13730), (2746, 7430), (2972, 6865), (3715, 5492)]