21443780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{56431}}^1$

素因数の和:56459

約数の個数: 24

約数和(自身を含む): 47402880

約数和(自身を除く): 25959100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 56431, 112862, 225724, 282155, 564310, 1072189, 1128620, 2144378, 4288756, 5360945, 10721890, 21443780]

約数ペア:

[(1, 21443780), (2, 10721890), (4, 5360945), (5, 4288756), (10, 2144378), (19, 1128620), (20, 1072189), (38, 564310), (76, 282155), (95, 225724), (190, 112862), (380, 56431)]