20985867

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{2069}}^1$

素因数の和:2112

約数の個数: 36

約数和(自身を含む): 36812880

約数和(自身を除く): 15827013

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 441, 483, 1127, 1449, 2069, 3381, 6207, 10143, 14483, 18621, 43449, 47587, 101381, 130347, 142761, 304143, 333109, 428283, 912429, 999327, 2331763, 2997981, 6995289, 20985867]

約数ペア:

[(1, 20985867), (3, 6995289), (7, 2997981), (9, 2331763), (21, 999327), (23, 912429), (49, 428283), (63, 333109), (69, 304143), (147, 142761), (161, 130347), (207, 101381), (441, 47587), (483, 43449), (1127, 18621), (1449, 14483), (2069, 10143), (3381, 6207)]