21453904

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31183}}^1$

素因数の和:31234

約数の個数: 20

約数和(自身を含む): 42534976

約数和(自身を除く): 21081072

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31183, 62366, 124732, 249464, 498928, 1340869, 2681738, 5363476, 10726952, 21453904]

約数ペア:

[(1, 21453904), (2, 10726952), (4, 5363476), (8, 2681738), (16, 1340869), (43, 498928), (86, 249464), (172, 124732), (344, 62366), (688, 31183)]