28556380

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{3491}}^1$

素因数の和:3909

約数の個数: 24

約数和(自身を含む): 60132240

約数和(自身を除く): 31575860

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 3491, 4090, 6982, 8180, 13964, 17455, 34910, 69820, 1427819, 2855638, 5711276, 7139095, 14278190, 28556380]

約数ペア:

[(1, 28556380), (2, 14278190), (4, 7139095), (5, 5711276), (10, 2855638), (20, 1427819), (409, 69820), (818, 34910), (1636, 17455), (2045, 13964), (3491, 8180), (4090, 6982)]