19905925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{2663}}^1$

素因数の和:2709

約数の個数: 24

約数和(自身を含む): 27748224

約数和(自身を除く): 7842299

約数列:

[1, 5, 13, 23, 25, 65, 115, 299, 325, 575, 1495, 2663, 7475, 13315, 34619, 61249, 66575, 173095, 306245, 796237, 865475, 1531225, 3981185, 19905925]

約数ペア:

[(1, 19905925), (5, 3981185), (13, 1531225), (23, 865475), (25, 796237), (65, 306245), (115, 173095), (299, 66575), (325, 61249), (575, 34619), (1495, 13315), (2663, 7475)]