21124784

素因数分解:

$2^4\times {\mathrm{491}}^1\times {\mathrm{2689}}^1$

素因数の和:3188

約数の個数: 20

約数和(自身を含む): 41027880

約数和(自身を除く): 19903096

約数列:

[1, 2, 4, 8, 16, 491, 982, 1964, 2689, 3928, 5378, 7856, 10756, 21512, 43024, 1320299, 2640598, 5281196, 10562392, 21124784]

約数ペア:

[(1, 21124784), (2, 10562392), (4, 5281196), (8, 2640598), (16, 1320299), (491, 43024), (982, 21512), (1964, 10756), (2689, 7856), (3928, 5378)]