21487905

素因数分解:

$3^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7127}}^1$

素因数の和:7205

約数の個数: 24

約数和(自身を含む): 37806912

約数和(自身を除く): 16319007

約数列:

[1, 3, 5, 9, 15, 45, 67, 201, 335, 603, 1005, 3015, 7127, 21381, 35635, 64143, 106905, 320715, 477509, 1432527, 2387545, 4297581, 7162635, 21487905]

約数ペア:

[(1, 21487905), (3, 7162635), (5, 4297581), (9, 2387545), (15, 1432527), (45, 477509), (67, 320715), (201, 106905), (335, 64143), (603, 35635), (1005, 21381), (3015, 7127)]