21730765

素因数分解:

$5^1\times 7^3\times {\mathrm{12671}}^1$

素因数の和:12697

約数の個数: 16

約数和(自身を含む): 30412800

約数和(自身を除く): 8682035

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 12671, 63355, 88697, 443485, 620879, 3104395, 4346153, 21730765]

約数ペア:

[(1, 21730765), (5, 4346153), (7, 3104395), (35, 620879), (49, 443485), (245, 88697), (343, 63355), (1715, 12671)]