21397784

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{56909}}^1$

素因数の和:56962

約数の個数: 16

約数和(自身を含む): 40975200

約数和(自身を除く): 19577416

約数列:

[1, 2, 4, 8, 47, 94, 188, 376, 56909, 113818, 227636, 455272, 2674723, 5349446, 10698892, 21397784]

約数ペア:

[(1, 21397784), (2, 10698892), (4, 5349446), (8, 2674723), (47, 455272), (94, 227636), (188, 113818), (376, 56909)]