20128381

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{163}}^1$

素因数の和:265

約数の個数: 32

約数和(自身を含む): 26449920

約数和(自身を除く): 6321539

約数列:

[1, 7, 13, 23, 59, 91, 161, 163, 299, 413, 767, 1141, 1357, 2093, 2119, 3749, 5369, 9499, 9617, 14833, 17641, 26243, 48737, 67319, 123487, 125021, 221191, 341159, 875147, 1548337, 2875483, 20128381]

約数ペア:

[(1, 20128381), (7, 2875483), (13, 1548337), (23, 875147), (59, 341159), (91, 221191), (161, 125021), (163, 123487), (299, 67319), (413, 48737), (767, 26243), (1141, 17641), (1357, 14833), (2093, 9617), (2119, 9499), (3749, 5369)]