1813820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1019}}^1$

素因数の和:1117

約数の個数: 24

約数和(自身を含む): 3855600

約数和(自身を除く): 2041780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1019, 1780, 2038, 4076, 5095, 10190, 20380, 90691, 181382, 362764, 453455, 906910, 1813820]

約数ペア:

[(1, 1813820), (2, 906910), (4, 453455), (5, 362764), (10, 181382), (20, 90691), (89, 20380), (178, 10190), (356, 5095), (445, 4076), (890, 2038), (1019, 1780)]