20217725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1987}}^1$

素因数の和:2045

約数の個数: 24

約数和(自身を含む): 28102368

約数和(自身を除く): 7884643

約数列:

[1, 5, 11, 25, 37, 55, 185, 275, 407, 925, 1987, 2035, 9935, 10175, 21857, 49675, 73519, 109285, 367595, 546425, 808709, 1837975, 4043545, 20217725]

約数ペア:

[(1, 20217725), (5, 4043545), (11, 1837975), (25, 808709), (37, 546425), (55, 367595), (185, 109285), (275, 73519), (407, 49675), (925, 21857), (1987, 10175), (2035, 9935)]