21290157

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{2099}}^1$

素因数の和:2142

約数の個数: 36

約数和(自身を含む): 37346400

約数和(自身を除く): 16056243

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 441, 483, 1127, 1449, 2099, 3381, 6297, 10143, 14693, 18891, 44079, 48277, 102851, 132237, 144831, 308553, 337939, 434493, 925659, 1013817, 2365573, 3041451, 7096719, 21290157]

約数ペア:

[(1, 21290157), (3, 7096719), (7, 3041451), (9, 2365573), (21, 1013817), (23, 925659), (49, 434493), (63, 337939), (69, 308553), (147, 144831), (161, 132237), (207, 102851), (441, 48277), (483, 44079), (1127, 18891), (1449, 14693), (2099, 10143), (3381, 6297)]