21181648

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19759}}^1$

素因数の和:19834

約数の個数: 20

約数和(自身を含む): 41654080

約数和(自身を除く): 20472432

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19759, 39518, 79036, 158072, 316144, 1323853, 2647706, 5295412, 10590824, 21181648]

約数ペア:

[(1, 21181648), (2, 10590824), (4, 5295412), (8, 2647706), (16, 1323853), (67, 316144), (134, 158072), (268, 79036), (536, 39518), (1072, 19759)]