21420581

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{953}}^1$

素因数の和:1005

約数の個数: 24

約数和(自身を含む): 27933120

約数和(自身を除く): 6512539

約数列:

[1, 7, 13, 19, 91, 133, 169, 247, 953, 1183, 1729, 3211, 6671, 12389, 18107, 22477, 86723, 126749, 161057, 235391, 1127399, 1647737, 3060083, 21420581]

約数ペア:

[(1, 21420581), (7, 3060083), (13, 1647737), (19, 1127399), (91, 235391), (133, 161057), (169, 126749), (247, 86723), (953, 22477), (1183, 18107), (1729, 12389), (3211, 6671)]