21664565

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{4219}}^1$

素因数の和:4316

約数の個数: 16

約数和(自身を含む): 28358400

約数和(自身を除く): 6693835

約数列:

[1, 5, 13, 65, 79, 395, 1027, 4219, 5135, 21095, 54847, 274235, 333301, 1666505, 4332913, 21664565]

約数ペア:

[(1, 21664565), (5, 4332913), (13, 1666505), (65, 333301), (79, 274235), (395, 54847), (1027, 21095), (4219, 5135)]