19680017825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{251261}}^1$

素因数の和:251525

約数の個数: 24

約数和(自身を含む): 26389545336

約数和(自身を除く): 6709527511

約数列:

[1, 5, 13, 25, 65, 241, 325, 1205, 3133, 6025, 15665, 78325, 251261, 1256305, 3266393, 6281525, 16331965, 60553901, 81659825, 302769505, 787200713, 1513847525, 3936003565, 19680017825]

約数ペア:

[(1, 19680017825), (5, 3936003565), (13, 1513847525), (25, 787200713), (65, 302769505), (241, 81659825), (325, 60553901), (1205, 16331965), (3133, 6281525), (6025, 3266393), (15665, 1256305), (78325, 251261)]