21316347

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 35875840

約数和(自身を除く): 14559493

約数列:

[1, 3, 9, 13, 19, 39, 43, 57, 117, 129, 171, 223, 247, 387, 559, 669, 741, 817, 1677, 2007, 2223, 2451, 2899, 4237, 5031, 7353, 8697, 9589, 10621, 12711, 26091, 28767, 31863, 38133, 55081, 86301, 95589, 124657, 165243, 182191, 373971, 495729, 546573, 1121913, 1639719, 2368483, 7105449, 21316347]

約数ペア:

[(1, 21316347), (3, 7105449), (9, 2368483), (13, 1639719), (19, 1121913), (39, 546573), (43, 495729), (57, 373971), (117, 182191), (129, 165243), (171, 124657), (223, 95589), (247, 86301), (387, 55081), (559, 38133), (669, 31863), (741, 28767), (817, 26091), (1677, 12711), (2007, 10621), (2223, 9589), (2451, 8697), (2899, 7353), (4237, 5031)]