871988980

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{221317}}^1$

素因数の和:221523

約数の個数: 24

約数和(自身を含む): 1840480488

約数和(自身を除く): 968491508

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 221317, 442634, 885268, 1106585, 2213170, 4426340, 43599449, 87198898, 174397796, 217997245, 435994490, 871988980]

約数ペア:

[(1, 871988980), (2, 435994490), (4, 217997245), (5, 174397796), (10, 87198898), (20, 43599449), (197, 4426340), (394, 2213170), (788, 1106585), (985, 885268), (1970, 442634), (3940, 221317)]