21994384

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{3361}}^1$

素因数の和:3778

約数の個数: 20

約数和(自身を含む): 42731020

約数和(自身を除く): 20736636

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3272, 3361, 6544, 6722, 13444, 26888, 53776, 1374649, 2749298, 5498596, 10997192, 21994384]

約数ペア:

[(1, 21994384), (2, 10997192), (4, 5498596), (8, 2749298), (16, 1374649), (409, 53776), (818, 26888), (1636, 13444), (3272, 6722), (3361, 6544)]