19919540

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21191}}^1$

素因数の和:21247

約数の個数: 24

約数和(自身を含む): 42723072

約数和(自身を除く): 22803532

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21191, 42382, 84764, 105955, 211910, 423820, 995977, 1991954, 3983908, 4979885, 9959770, 19919540]

約数ペア:

[(1, 19919540), (2, 9959770), (4, 4979885), (5, 3983908), (10, 1991954), (20, 995977), (47, 423820), (94, 211910), (188, 105955), (235, 84764), (470, 42382), (940, 21191)]