20305257

素因数分解:

$3^1\times 7^4\times {\mathrm{2819}}^1$

素因数の和:2850

約数の個数: 20

約数和(自身を含む): 31595280

約数和(自身を除く): 11290023

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 2819, 7203, 8457, 19733, 59199, 138131, 414393, 966917, 2900751, 6768419, 20305257]

約数ペア:

[(1, 20305257), (3, 6768419), (7, 2900751), (21, 966917), (49, 414393), (147, 138131), (343, 59199), (1029, 19733), (2401, 8457), (2819, 7203)]