21264784

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{18719}}^1$

素因数の和:18798

約数の個数: 20

約数和(自身を含む): 41783040

約数和(自身を除く): 20518256

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 18719, 37438, 74876, 149752, 299504, 1329049, 2658098, 5316196, 10632392, 21264784]

約数ペア:

[(1, 21264784), (2, 10632392), (4, 5316196), (8, 2658098), (16, 1329049), (71, 299504), (142, 149752), (284, 74876), (568, 37438), (1136, 18719)]