19842980

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1543}}^1$

素因数の和:2195

約数の個数: 24

約数和(自身を含む): 41762112

約数和(自身を除く): 21919132

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1543, 2572, 3086, 3215, 6172, 6430, 7715, 12860, 15430, 30860, 992149, 1984298, 3968596, 4960745, 9921490, 19842980]

約数ペア:

[(1, 19842980), (2, 9921490), (4, 4960745), (5, 3968596), (10, 1984298), (20, 992149), (643, 30860), (1286, 15430), (1543, 12860), (2572, 7715), (3086, 6430), (3215, 6172)]