20487920

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8831}}^1$

素因数の和:8873

約数の個数: 40

約数和(自身を含む): 49282560

約数和(自身を除く): 28794640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8831, 17662, 35324, 44155, 70648, 88310, 141296, 176620, 256099, 353240, 512198, 706480, 1024396, 1280495, 2048792, 2560990, 4097584, 5121980, 10243960, 20487920]

約数ペア:

[(1, 20487920), (2, 10243960), (4, 5121980), (5, 4097584), (8, 2560990), (10, 2048792), (16, 1280495), (20, 1024396), (29, 706480), (40, 512198), (58, 353240), (80, 256099), (116, 176620), (145, 141296), (232, 88310), (290, 70648), (464, 44155), (580, 35324), (1160, 17662), (2320, 8831)]