20991698

素因数分解:

$2^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{16477}}^1$

素因数の和:16506

約数の個数: 24

約数和(自身を含む): 39448332

約数和(自身を除く): 18456634

約数列:

[1, 2, 7, 13, 14, 26, 49, 91, 98, 182, 637, 1274, 16477, 32954, 115339, 214201, 230678, 428402, 807373, 1499407, 1614746, 2998814, 10495849, 20991698]

約数ペア:

[(1, 20991698), (2, 10495849), (7, 2998814), (13, 1614746), (14, 1499407), (26, 807373), (49, 428402), (91, 230678), (98, 214201), (182, 115339), (637, 32954), (1274, 16477)]