28708280

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{2591}}^1$

素因数の和:2879

約数の個数: 32

約数和(自身を含む): 64851840

約数和(自身を除く): 36143560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 2216, 2591, 2770, 5182, 5540, 10364, 11080, 12955, 20728, 25910, 51820, 103640, 717707, 1435414, 2870828, 3588535, 5741656, 7177070, 14354140, 28708280]

約数ペア:

[(1, 28708280), (2, 14354140), (4, 7177070), (5, 5741656), (8, 3588535), (10, 2870828), (20, 1435414), (40, 717707), (277, 103640), (554, 51820), (1108, 25910), (1385, 20728), (2216, 12955), (2591, 11080), (2770, 10364), (5182, 5540)]