28309475

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:511

約数の個数: 24

約数和(自身を含む): 36560160

約数和(自身を除く): 8250685

約数列:

[1, 5, 25, 41, 71, 205, 355, 389, 1025, 1775, 1945, 2911, 9725, 14555, 15949, 27619, 72775, 79745, 138095, 398725, 690475, 1132379, 5661895, 28309475]

約数ペア:

[(1, 28309475), (5, 5661895), (25, 1132379), (41, 690475), (71, 398725), (205, 138095), (355, 79745), (389, 72775), (1025, 27619), (1775, 15949), (1945, 14555), (2911, 9725)]