21708159

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{773}}^1$

素因数の和:847

約数の個数: 32

約数和(自身を含む): 33882624

約数和(自身を除く): 12174465

約数列:

[1, 3, 11, 23, 33, 37, 69, 111, 253, 407, 759, 773, 851, 1221, 2319, 2553, 8503, 9361, 17779, 25509, 28083, 28601, 53337, 85803, 195569, 314611, 586707, 657823, 943833, 1973469, 7236053, 21708159]

約数ペア:

[(1, 21708159), (3, 7236053), (11, 1973469), (23, 943833), (33, 657823), (37, 586707), (69, 314611), (111, 195569), (253, 85803), (407, 53337), (759, 28601), (773, 28083), (851, 25509), (1221, 17779), (2319, 9361), (2553, 8503)]