20489930

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2803}}^1$

素因数の和:2870

約数の個数: 32

約数和(自身を含む): 39973824

約数和(自身を除く): 19483894

約数列:

[1, 2, 5, 10, 17, 34, 43, 85, 86, 170, 215, 430, 731, 1462, 2803, 3655, 5606, 7310, 14015, 28030, 47651, 95302, 120529, 238255, 241058, 476510, 602645, 1205290, 2048993, 4097986, 10244965, 20489930]

約数ペア:

[(1, 20489930), (2, 10244965), (5, 4097986), (10, 2048993), (17, 1205290), (34, 602645), (43, 476510), (85, 241058), (86, 238255), (170, 120529), (215, 95302), (430, 47651), (731, 28030), (1462, 14015), (2803, 7310), (3655, 5606)]