28420287

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{18539}}^1$

素因数の和:18622

約数の個数: 16

約数和(自身を含む): 43902720

約数和(自身を除く): 15482433

約数列:

[1, 3, 7, 21, 73, 219, 511, 1533, 18539, 55617, 129773, 389319, 1353347, 4060041, 9473429, 28420287]

約数ペア:

[(1, 28420287), (3, 9473429), (7, 4060041), (21, 1353347), (73, 389319), (219, 129773), (511, 55617), (1533, 18539)]