21318728

素因数分解:

$2^3\times {\mathrm{127}}^1\times {\mathrm{20983}}^1$

素因数の和:21116

約数の個数: 16

約数和(自身を含む): 40289280

約数和(自身を除く): 18970552

約数列:

[1, 2, 4, 8, 127, 254, 508, 1016, 20983, 41966, 83932, 167864, 2664841, 5329682, 10659364, 21318728]

約数ペア:

[(1, 21318728), (2, 10659364), (4, 5329682), (8, 2664841), (127, 167864), (254, 83932), (508, 41966), (1016, 20983)]