20521179

素因数分解:

$3^2\times 7^1\times {\mathrm{283}}^1\times {\mathrm{1151}}^1$

素因数の和:1447

約数の個数: 24

約数和(自身を含む): 34025472

約数和(自身を除く): 13504293

約数列:

[1, 3, 7, 9, 21, 63, 283, 849, 1151, 1981, 2547, 3453, 5943, 8057, 10359, 17829, 24171, 72513, 325733, 977199, 2280131, 2931597, 6840393, 20521179]

約数ペア:

[(1, 20521179), (3, 6840393), (7, 2931597), (9, 2280131), (21, 977199), (63, 325733), (283, 72513), (849, 24171), (1151, 17829), (1981, 10359), (2547, 8057), (3453, 5943)]