18937863

素因数分解:

$3^2\times 7^2\times {\mathrm{42943}}^1$

素因数の和:42963

約数の個数: 18

約数和(自身を含む): 31821504

約数和(自身を除く): 12883641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 42943, 128829, 300601, 386487, 901803, 2104207, 2705409, 6312621, 18937863]

約数ペア:

[(1, 18937863), (3, 6312621), (7, 2705409), (9, 2104207), (21, 901803), (49, 386487), (63, 300601), (147, 128829), (441, 42943)]