21805552

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{20341}}^1$

素因数の和:20416

約数の個数: 20

約数和(自身を含む): 42880936

約数和(自身を除く): 21075384

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 20341, 40682, 81364, 162728, 325456, 1362847, 2725694, 5451388, 10902776, 21805552]

約数ペア:

[(1, 21805552), (2, 10902776), (4, 5451388), (8, 2725694), (16, 1362847), (67, 325456), (134, 162728), (268, 81364), (536, 40682), (1072, 20341)]