20700981

素因数分解:

$3^3\times 7^2\times {\mathrm{15647}}^1$

素因数の和:15670

約数の個数: 24

約数和(自身を含む): 35677440

約数和(自身を除く): 14976459

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15647, 46941, 109529, 140823, 328587, 422469, 766703, 985761, 2300109, 2957283, 6900327, 20700981]

約数ペア:

[(1, 20700981), (3, 6900327), (7, 2957283), (9, 2300109), (21, 985761), (27, 766703), (49, 422469), (63, 328587), (147, 140823), (189, 109529), (441, 46941), (1323, 15647)]