21436784

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19997}}^1$

素因数の和:20072

約数の個数: 20

約数和(自身を含む): 42155784

約数和(自身を除く): 20719000

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19997, 39994, 79988, 159976, 319952, 1339799, 2679598, 5359196, 10718392, 21436784]

約数ペア:

[(1, 21436784), (2, 10718392), (4, 5359196), (8, 2679598), (16, 1339799), (67, 319952), (134, 159976), (268, 79988), (536, 39994), (1072, 19997)]