21681365

素因数分解:

$5^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1\times {\mathrm{311}}^1$

素因数の和:580

約数の個数: 16

約数和(自身を含む): 26597376

約数和(自身を除く): 4916011

約数列:

[1, 5, 73, 191, 311, 365, 955, 1555, 13943, 22703, 59401, 69715, 113515, 297005, 4336273, 21681365]

約数ペア:

[(1, 21681365), (5, 4336273), (73, 297005), (191, 113515), (311, 69715), (365, 59401), (955, 22703), (1555, 13943)]