21287365

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{9001}}^1$

素因数の和:9060

約数の個数: 16

約数和(自身を含む): 28518336

約数和(自身を除く): 7230971

約数列:

[1, 5, 11, 43, 55, 215, 473, 2365, 9001, 45005, 99011, 387043, 495055, 1935215, 4257473, 21287365]

約数ペア:

[(1, 21287365), (5, 4257473), (11, 1935215), (43, 495055), (55, 387043), (215, 99011), (473, 45005), (2365, 9001)]