21700855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{571}}^1\times {\mathrm{691}}^1$

素因数の和:1278

約数の個数: 16

約数和(自身を含む): 28499328

約数和(自身を除く): 6798473

約数列:

[1, 5, 11, 55, 571, 691, 2855, 3455, 6281, 7601, 31405, 38005, 394561, 1972805, 4340171, 21700855]

約数ペア:

[(1, 21700855), (5, 4340171), (11, 1972805), (55, 394561), (571, 38005), (691, 31405), (2855, 7601), (3455, 6281)]