19971580

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1553}}^1$

素因数の和:2205

約数の個数: 24

約数和(自身を含む): 42032592

約数和(自身を除く): 22061012

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1553, 2572, 3106, 3215, 6212, 6430, 7765, 12860, 15530, 31060, 998579, 1997158, 3994316, 4992895, 9985790, 19971580]

約数ペア:

[(1, 19971580), (2, 9985790), (4, 4992895), (5, 3994316), (10, 1997158), (20, 998579), (643, 31060), (1286, 15530), (1553, 12860), (2572, 7765), (3106, 6430), (3215, 6212)]