20657975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3739}}^1$

素因数の和:3779

約数の個数: 24

約数和(自身を含む): 29216880

約数和(自身を除く): 8558905

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3739, 5525, 18695, 48607, 63563, 93475, 243035, 317815, 826319, 1215175, 1589075, 4131595, 20657975]

約数ペア:

[(1, 20657975), (5, 4131595), (13, 1589075), (17, 1215175), (25, 826319), (65, 317815), (85, 243035), (221, 93475), (325, 63563), (425, 48607), (1105, 18695), (3739, 5525)]