21181912

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{64579}}^1$

素因数の和:64626

約数の個数: 16

約数和(自身を含む): 40685400

約数和(自身を除く): 19503488

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 64579, 129158, 258316, 516632, 2647739, 5295478, 10590956, 21181912]

約数ペア:

[(1, 21181912), (2, 10590956), (4, 5295478), (8, 2647739), (41, 516632), (82, 258316), (164, 129158), (328, 64579)]