20091281875

素因数分解:

$5^4\times 7^1\times {\mathrm{1621}}^1\times {\mathrm{2833}}^1$

素因数の和:4481

約数の個数: 40

約数和(自身を含む): 28720481504

約数和(自身を除く): 8629199629

約数列:

[1, 5, 7, 25, 35, 125, 175, 625, 875, 1621, 2833, 4375, 8105, 11347, 14165, 19831, 40525, 56735, 70825, 99155, 202625, 283675, 354125, 495775, 1013125, 1418375, 1770625, 2478875, 4592293, 7091875, 12394375, 22961465, 32146051, 114807325, 160730255, 574036625, 803651275, 2870183125, 4018256375, 20091281875]

約数ペア:

[(1, 20091281875), (5, 4018256375), (7, 2870183125), (25, 803651275), (35, 574036625), (125, 160730255), (175, 114807325), (625, 32146051), (875, 22961465), (1621, 12394375), (2833, 7091875), (4375, 4592293), (8105, 2478875), (11347, 1770625), (14165, 1418375), (19831, 1013125), (40525, 495775), (56735, 354125), (70825, 283675), (99155, 202625)]