28876840

素因数分解:

$2^3\times 5^1\times {\mathrm{721921}}^1$

素因数の和:721932

約数の個数: 16

約数和(自身を含む): 64972980

約数和(自身を除く): 36096140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 721921, 1443842, 2887684, 3609605, 5775368, 7219210, 14438420, 28876840]

約数ペア:

[(1, 28876840), (2, 14438420), (4, 7219210), (5, 5775368), (8, 3609605), (10, 2887684), (20, 1443842), (40, 721921)]