21717880

素因数分解:

$2^3\times 5^1\times {\mathrm{542947}}^1$

素因数の和:542958

約数の個数: 16

約数和(自身を含む): 48865320

約数和(自身を除く): 27147440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542947, 1085894, 2171788, 2714735, 4343576, 5429470, 10858940, 21717880]

約数ペア:

[(1, 21717880), (2, 10858940), (4, 5429470), (5, 4343576), (8, 2714735), (10, 2171788), (20, 1085894), (40, 542947)]