21160665

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 18151335

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 139, 153, 199, 255, 417, 597, 695, 765, 995, 1251, 1791, 2085, 2363, 2985, 3383, 6255, 7089, 8955, 10149, 11815, 16915, 21267, 27661, 30447, 35445, 50745, 82983, 106335, 138305, 152235, 248949, 414915, 470237, 1244745, 1410711, 2351185, 4232133, 7053555, 21160665]

約数ペア:

[(1, 21160665), (3, 7053555), (5, 4232133), (9, 2351185), (15, 1410711), (17, 1244745), (45, 470237), (51, 414915), (85, 248949), (139, 152235), (153, 138305), (199, 106335), (255, 82983), (417, 50745), (597, 35445), (695, 30447), (765, 27661), (995, 21267), (1251, 16915), (1791, 11815), (2085, 10149), (2363, 8955), (2985, 7089), (3383, 6255)]