20403955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{28537}}^1$

素因数の和:28566

約数の個数: 16

約数和(自身を含む): 28766304

約数和(自身を除く): 8362349

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 28537, 142685, 313907, 370981, 1569535, 1854905, 4080791, 20403955]

約数ペア:

[(1, 20403955), (5, 4080791), (11, 1854905), (13, 1569535), (55, 370981), (65, 313907), (143, 142685), (715, 28537)]