19938025

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1091}}^1$

素因数の和:1161

約数の個数: 24

約数和(自身を含む): 26810784

約数和(自身を除く): 6872759

約数列:

[1, 5, 17, 25, 43, 85, 215, 425, 731, 1075, 1091, 3655, 5455, 18275, 18547, 27275, 46913, 92735, 234565, 463675, 797521, 1172825, 3987605, 19938025]

約数ペア:

[(1, 19938025), (5, 3987605), (17, 1172825), (25, 797521), (43, 463675), (85, 234565), (215, 92735), (425, 46913), (731, 27275), (1075, 18547), (1091, 18275), (3655, 5455)]