20811231

素因数分解:

$3^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{1151}}^1$

素因数の和:1212

約数の個数: 36

約数和(自身を含む): 35852544

約数和(自身を除く): 15041313

約数列:

[1, 3, 7, 9, 21, 41, 49, 63, 123, 147, 287, 369, 441, 861, 1151, 2009, 2583, 3453, 6027, 8057, 10359, 18081, 24171, 47191, 56399, 72513, 141573, 169197, 330337, 424719, 507591, 991011, 2312359, 2973033, 6937077, 20811231]

約数ペア:

[(1, 20811231), (3, 6937077), (7, 2973033), (9, 2312359), (21, 991011), (41, 507591), (49, 424719), (63, 330337), (123, 169197), (147, 141573), (287, 72513), (369, 56399), (441, 47191), (861, 24171), (1151, 18081), (2009, 10359), (2583, 8057), (3453, 6027)]