20990151

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8543}}^1$

素因数の和:8572

約数の個数: 32

約数和(自身を含む): 38277120

約数和(自身を除く): 17286969

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 189, 273, 351, 819, 2457, 8543, 25629, 59801, 76887, 111059, 179403, 230661, 333177, 538209, 777413, 999531, 1614627, 2332239, 2998593, 6996717, 20990151]

約数ペア:

[(1, 20990151), (3, 6996717), (7, 2998593), (9, 2332239), (13, 1614627), (21, 999531), (27, 777413), (39, 538209), (63, 333177), (91, 230661), (117, 179403), (189, 111059), (273, 76887), (351, 59801), (819, 25629), (2457, 8543)]