21806800

素因数分解:

$2^4\times 5^2\times {\mathrm{54517}}^1$

素因数の和:54535

約数の個数: 30

約数和(自身を含む): 52391798

約数和(自身を除く): 30584998

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 54517, 109034, 218068, 272585, 436136, 545170, 872272, 1090340, 1362925, 2180680, 2725850, 4361360, 5451700, 10903400, 21806800]

約数ペア:

[(1, 21806800), (2, 10903400), (4, 5451700), (5, 4361360), (8, 2725850), (10, 2180680), (16, 1362925), (20, 1090340), (25, 872272), (40, 545170), (50, 436136), (80, 272585), (100, 218068), (200, 109034), (400, 54517)]