21980218

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{223}}^2$

素因数の和:478

約数の個数: 24

約数和(自身を含む): 37764468

約数和(自身を除く): 15784250

約数列:

[1, 2, 13, 17, 26, 34, 221, 223, 442, 446, 2899, 3791, 5798, 7582, 49283, 49729, 98566, 99458, 646477, 845393, 1292954, 1690786, 10990109, 21980218]

約数ペア:

[(1, 21980218), (2, 10990109), (13, 1690786), (17, 1292954), (26, 845393), (34, 646477), (221, 99458), (223, 98566), (442, 49729), (446, 49283), (2899, 7582), (3791, 5798)]