16678820

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1301}}^1$

素因数の和:1951

約数の個数: 24

約数和(自身を含む): 35107128

約数和(自身を除く): 18428308

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1301, 2564, 2602, 3205, 5204, 6410, 6505, 12820, 13010, 26020, 833941, 1667882, 3335764, 4169705, 8339410, 16678820]

約数ペア:

[(1, 16678820), (2, 8339410), (4, 4169705), (5, 3335764), (10, 1667882), (20, 833941), (641, 26020), (1282, 13010), (1301, 12820), (2564, 6505), (2602, 6410), (3205, 5204)]