21357865

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{3539}}^1$

素因数の和:3632

約数の個数: 16

約数和(自身を含む): 27527040

約数和(自身を除く): 6169175

約数列:

[1, 5, 17, 71, 85, 355, 1207, 3539, 6035, 17695, 60163, 251269, 300815, 1256345, 4271573, 21357865]

約数ペア:

[(1, 21357865), (5, 4271573), (17, 1256345), (71, 300815), (85, 251269), (355, 60163), (1207, 17695), (3539, 6035)]