21171256

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155671}}^1$

素因数の和:155694

約数の個数: 16

約数和(自身を含む): 42031440

約数和(自身を除く): 20860184

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155671, 311342, 622684, 1245368, 2646407, 5292814, 10585628, 21171256]

約数ペア:

[(1, 21171256), (2, 10585628), (4, 5292814), (8, 2646407), (17, 1245368), (34, 622684), (68, 311342), (136, 155671)]