18947825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{337}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 25524408

約数和(自身を除く): 6576583

約数列:

[1, 5, 13, 25, 65, 173, 325, 337, 865, 1685, 2249, 4325, 4381, 8425, 11245, 21905, 56225, 58301, 109525, 291505, 757913, 1457525, 3789565, 18947825]

約数ペア:

[(1, 18947825), (5, 3789565), (13, 1457525), (25, 757913), (65, 291505), (173, 109525), (325, 58301), (337, 56225), (865, 21905), (1685, 11245), (2249, 8425), (4325, 4381)]