20521425

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{14401}}^1$

素因数の和:14433

約数の個数: 24

約数和(自身を含む): 35716960

約数和(自身を除く): 15195535

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475, 1425, 14401, 43203, 72005, 216015, 273619, 360025, 820857, 1080075, 1368095, 4104285, 6840475, 20521425]

約数ペア:

[(1, 20521425), (3, 6840475), (5, 4104285), (15, 1368095), (19, 1080075), (25, 820857), (57, 360025), (75, 273619), (95, 216015), (285, 72005), (475, 43203), (1425, 14401)]