20511205

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{28687}}^1$

素因数の和:28716

約数の個数: 16

約数和(自身を含む): 28917504

約数和(自身を除く): 8406299

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 28687, 143435, 315557, 372931, 1577785, 1864655, 4102241, 20511205]

約数ペア:

[(1, 20511205), (5, 4102241), (11, 1864655), (13, 1577785), (55, 372931), (65, 315557), (143, 143435), (715, 28687)]