21181515

素因数分解:

$3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{10159}}^1$

素因数の和:10306

約数の個数: 16

約数和(自身を含む): 34137600

約数和(自身を除く): 12956085

約数列:

[1, 3, 5, 15, 139, 417, 695, 2085, 10159, 30477, 50795, 152385, 1412101, 4236303, 7060505, 21181515]

約数ペア:

[(1, 21181515), (3, 7060505), (5, 4236303), (15, 1412101), (139, 152385), (417, 50795), (695, 30477), (2085, 10159)]