21002439

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{653}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 28629504

約数和(自身を除く): 7627065

約数列:

[1, 3, 71, 151, 213, 453, 653, 1959, 10721, 32163, 46363, 98603, 139089, 295809, 7000813, 21002439]

約数ペア:

[(1, 21002439), (3, 7000813), (71, 295809), (151, 139089), (213, 98603), (453, 46363), (653, 32163), (1959, 10721)]