21191728

素因数分解:

$2^4\times {\mathrm{127}}^1\times {\mathrm{10429}}^1$

素因数の和:10564

約数の個数: 20

約数和(自身を含む): 41386240

約数和(自身を除く): 20194512

約数列:

[1, 2, 4, 8, 16, 127, 254, 508, 1016, 2032, 10429, 20858, 41716, 83432, 166864, 1324483, 2648966, 5297932, 10595864, 21191728]

約数ペア:

[(1, 21191728), (2, 10595864), (4, 5297932), (8, 2648966), (16, 1324483), (127, 166864), (254, 83432), (508, 41716), (1016, 20858), (2032, 10429)]