28135880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{9907}}^1$

素因数の和:9989

約数の個数: 32

約数和(自身を含む): 64203840

約数和(自身を除く): 36067960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 9907, 19814, 39628, 49535, 79256, 99070, 198140, 396280, 703397, 1406794, 2813588, 3516985, 5627176, 7033970, 14067940, 28135880]

約数ペア:

[(1, 28135880), (2, 14067940), (4, 7033970), (5, 5627176), (8, 3516985), (10, 2813588), (20, 1406794), (40, 703397), (71, 396280), (142, 198140), (284, 99070), (355, 79256), (568, 49535), (710, 39628), (1420, 19814), (2840, 9907)]