20438900

素因数分解:

$2^2\times 5^2\times {\mathrm{313}}^1\times {\mathrm{653}}^1$

素因数の和:980

約数の個数: 36

約数和(自身を含む): 44562252

約数和(自身を除く): 24123352

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 313, 626, 653, 1252, 1306, 1565, 2612, 3130, 3265, 6260, 6530, 7825, 13060, 15650, 16325, 31300, 32650, 65300, 204389, 408778, 817556, 1021945, 2043890, 4087780, 5109725, 10219450, 20438900]

約数ペア:

[(1, 20438900), (2, 10219450), (4, 5109725), (5, 4087780), (10, 2043890), (20, 1021945), (25, 817556), (50, 408778), (100, 204389), (313, 65300), (626, 32650), (653, 31300), (1252, 16325), (1306, 15650), (1565, 13060), (2612, 7825), (3130, 6530), (3265, 6260)]