21090321

素因数分解:

$3^3\times 7^1\times {\mathrm{151}}^1\times {\mathrm{739}}^1$

素因数の和:906

約数の個数: 32

約数和(自身を含む): 35993600

約数和(自身を除く): 14903279

約数列:

[1, 3, 7, 9, 21, 27, 63, 151, 189, 453, 739, 1057, 1359, 2217, 3171, 4077, 5173, 6651, 9513, 15519, 19953, 28539, 46557, 111589, 139671, 334767, 781123, 1004301, 2343369, 3012903, 7030107, 21090321]

約数ペア:

[(1, 21090321), (3, 7030107), (7, 3012903), (9, 2343369), (21, 1004301), (27, 781123), (63, 334767), (151, 139671), (189, 111589), (453, 46557), (739, 28539), (1057, 19953), (1359, 15519), (2217, 9513), (3171, 6651), (4077, 5173)]