21784203

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{18199}}^1$

素因数の和:18231

約数の個数: 24

約数和(自身を含む): 37856000

約数和(自身を除く): 16071797

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 18199, 54597, 127393, 163791, 345781, 382179, 1037343, 1146537, 2420467, 3112029, 7261401, 21784203]

約数ペア:

[(1, 21784203), (3, 7261401), (7, 3112029), (9, 2420467), (19, 1146537), (21, 1037343), (57, 382179), (63, 345781), (133, 163791), (171, 127393), (399, 54597), (1197, 18199)]