21330981

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{9151}}^1$

素因数の和:9201

約数の個数: 24

約数和(自身を含む): 36168704

約数和(自身を除く): 14837723

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 9151, 27453, 64057, 82359, 192171, 338587, 576513, 1015761, 2370109, 3047283, 7110327, 21330981]

約数ペア:

[(1, 21330981), (3, 7110327), (7, 3047283), (9, 2370109), (21, 1015761), (37, 576513), (63, 338587), (111, 192171), (259, 82359), (333, 64057), (777, 27453), (2331, 9151)]