81438640

素因数分解:

$2^4\times 5^1\times {\mathrm{433}}^1\times {\mathrm{2351}}^1$

素因数の和:2797

約数の個数: 40

約数和(自身を含む): 189862848

約数和(自身を除く): 108424208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 433, 866, 1732, 2165, 2351, 3464, 4330, 4702, 6928, 8660, 9404, 11755, 17320, 18808, 23510, 34640, 37616, 47020, 94040, 188080, 1017983, 2035966, 4071932, 5089915, 8143864, 10179830, 16287728, 20359660, 40719320, 81438640]

約数ペア:

[(1, 81438640), (2, 40719320), (4, 20359660), (5, 16287728), (8, 10179830), (10, 8143864), (16, 5089915), (20, 4071932), (40, 2035966), (80, 1017983), (433, 188080), (866, 94040), (1732, 47020), (2165, 37616), (2351, 34640), (3464, 23510), (4330, 18808), (4702, 17320), (6928, 11755), (8660, 9404)]