20890420

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6653}}^1$

素因数の和:6819

約数の個数: 24

約数和(自身を含む): 44155944

約数和(自身を除く): 23265524

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6653, 13306, 26612, 33265, 66530, 133060, 1044521, 2089042, 4178084, 5222605, 10445210, 20890420]

約数ペア:

[(1, 20890420), (2, 10445210), (4, 5222605), (5, 4178084), (10, 2089042), (20, 1044521), (157, 133060), (314, 66530), (628, 33265), (785, 26612), (1570, 13306), (3140, 6653)]