21900459

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{307}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 34693120

約数和(自身を除く): 12792661

約数列:

[1, 3, 7, 21, 43, 79, 129, 237, 301, 307, 553, 903, 921, 1659, 2149, 3397, 6447, 10191, 13201, 23779, 24253, 39603, 71337, 72759, 92407, 169771, 277221, 509313, 1042879, 3128637, 7300153, 21900459]

約数ペア:

[(1, 21900459), (3, 7300153), (7, 3128637), (21, 1042879), (43, 509313), (79, 277221), (129, 169771), (237, 92407), (301, 72759), (307, 71337), (553, 39603), (903, 24253), (921, 23779), (1659, 13201), (2149, 10191), (3397, 6447)]