20398555

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5581}}^1$

素因数の和:5646

約数の個数: 16

約数和(自身を含む): 26525664

約数和(自身を除く): 6127109

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5581, 27905, 94877, 239983, 474385, 1199915, 4079711, 20398555]

約数ペア:

[(1, 20398555), (5, 4079711), (17, 1199915), (43, 474385), (85, 239983), (215, 94877), (731, 27905), (3655, 5581)]