19980700

素因数分解:

$2^2\times 5^2\times {\mathrm{199807}}^1$

素因数の和:199821

約数の個数: 18

約数和(自身を含む): 43358336

約数和(自身を除く): 23377636

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199807, 399614, 799228, 999035, 1998070, 3996140, 4995175, 9990350, 19980700]

約数ペア:

[(1, 19980700), (2, 9990350), (4, 4995175), (5, 3996140), (10, 1998070), (20, 999035), (25, 799228), (50, 399614), (100, 199807)]