20981506

素因数分解:

$2^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{383}}^1$

素因数の和:455

約数の個数: 48

約数和(自身を含む): 40449024

約数和(自身を除く): 19467518

約数列:

[1, 2, 7, 13, 14, 26, 43, 49, 86, 91, 98, 182, 301, 383, 559, 602, 637, 766, 1118, 1274, 2107, 2681, 3913, 4214, 4979, 5362, 7826, 9958, 16469, 18767, 27391, 32938, 34853, 37534, 54782, 69706, 115283, 214097, 230566, 243971, 428194, 487942, 806981, 1498679, 1613962, 2997358, 10490753, 20981506]

約数ペア:

[(1, 20981506), (2, 10490753), (7, 2997358), (13, 1613962), (14, 1498679), (26, 806981), (43, 487942), (49, 428194), (86, 243971), (91, 230566), (98, 214097), (182, 115283), (301, 69706), (383, 54782), (559, 37534), (602, 34853), (637, 32938), (766, 27391), (1118, 18767), (1274, 16469), (2107, 9958), (2681, 7826), (3913, 5362), (4214, 4979)]