18712975

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{487}}^1$

素因数の和:579

約数の個数: 24

約数和(自身を含む): 24507360

約数和(自身を除く): 5794385

約数列:

[1, 5, 25, 29, 53, 145, 265, 487, 725, 1325, 1537, 2435, 7685, 12175, 14123, 25811, 38425, 70615, 129055, 353075, 645275, 748519, 3742595, 18712975]

約数ペア:

[(1, 18712975), (5, 3742595), (25, 748519), (29, 645275), (53, 353075), (145, 129055), (265, 70615), (487, 38425), (725, 25811), (1325, 14123), (1537, 12175), (2435, 7685)]