20394425

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{197}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 26295192

約数和(自身を除く): 5900767

約数列:

[1, 5, 25, 41, 101, 197, 205, 505, 985, 1025, 2525, 4141, 4925, 8077, 19897, 20705, 40385, 99485, 103525, 201925, 497425, 815777, 4078885, 20394425]

約数ペア:

[(1, 20394425), (5, 4078885), (25, 815777), (41, 497425), (101, 201925), (197, 103525), (205, 99485), (505, 40385), (985, 20705), (1025, 19897), (2525, 8077), (4141, 4925)]