20684745

素因数分解:

$3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{2657}}^1$

素因数の和:2841

約数の個数: 24

約数和(自身を含む): 36074376

約数和(自身を除く): 15389631

約数列:

[1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595, 2657, 7785, 7971, 13285, 23913, 39855, 119565, 459661, 1378983, 2298305, 4136949, 6894915, 20684745]

約数ペア:

[(1, 20684745), (3, 6894915), (5, 4136949), (9, 2298305), (15, 1378983), (45, 459661), (173, 119565), (519, 39855), (865, 23913), (1557, 13285), (2595, 7971), (2657, 7785)]