20818475

素因数分解:

$5^2\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{127}}^1$

素因数の和:299

約数の個数: 24

約数和(自身を含む): 26664960

約数和(自身を除く): 5846485

約数列:

[1, 5, 25, 79, 83, 127, 395, 415, 635, 1975, 2075, 3175, 6557, 10033, 10541, 32785, 50165, 52705, 163925, 250825, 263525, 832739, 4163695, 20818475]

約数ペア:

[(1, 20818475), (5, 4163695), (25, 832739), (79, 263525), (83, 250825), (127, 163925), (395, 52705), (415, 50165), (635, 32785), (1975, 10541), (2075, 10033), (3175, 6557)]