21139085

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1951}}^1$

素因数の和:2164

約数の個数: 16

約数和(自身を含む): 27827712

約数和(自身を除く): 6688627

約数列:

[1, 5, 11, 55, 197, 985, 1951, 2167, 9755, 10835, 21461, 107305, 384347, 1921735, 4227817, 21139085]

約数ペア:

[(1, 21139085), (5, 4227817), (11, 1921735), (55, 384347), (197, 107305), (985, 21461), (1951, 10835), (2167, 9755)]