21015909

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{16561}}^1$

素因数の和:16617

約数の個数: 16

約数和(自身を含む): 31799040

約数和(自身を除く): 10783131

約数列:

[1, 3, 9, 27, 47, 141, 423, 1269, 16561, 49683, 149049, 447147, 778367, 2335101, 7005303, 21015909]

約数ペア:

[(1, 21015909), (3, 7005303), (9, 2335101), (27, 778367), (47, 447147), (141, 149049), (423, 49683), (1269, 16561)]