28678340

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2237}}^1$

素因数の和:2887

約数の個数: 24

約数和(自身を含む): 60345432

約数和(自身を除く): 31667092

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 2237, 2564, 3205, 4474, 6410, 8948, 11185, 12820, 22370, 44740, 1433917, 2867834, 5735668, 7169585, 14339170, 28678340]

約数ペア:

[(1, 28678340), (2, 14339170), (4, 7169585), (5, 5735668), (10, 2867834), (20, 1433917), (641, 44740), (1282, 22370), (2237, 12820), (2564, 11185), (3205, 8948), (4474, 6410)]