20780155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{16427}}^1$

素因数の和:16466

約数の個数: 16

約数和(自身を含む): 28387584

約数和(自身を除く): 7607429

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 16427, 82135, 180697, 377821, 903485, 1889105, 4156031, 20780155]

約数ペア:

[(1, 20780155), (5, 4156031), (11, 1889105), (23, 903485), (55, 377821), (115, 180697), (253, 82135), (1265, 16427)]