21231287

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{2677}}^1$

素因数の和:2798

約数の個数: 16

約数和(自身を含む): 26737152

約数和(自身を除く): 5505865

約数列:

[1, 7, 11, 77, 103, 721, 1133, 2677, 7931, 18739, 29447, 206129, 275731, 1930117, 3033041, 21231287]

約数ペア:

[(1, 21231287), (7, 3033041), (11, 1930117), (77, 275731), (103, 206129), (721, 29447), (1133, 18739), (2677, 7931)]