17431280

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1999}}^1$

素因数の和:2121

約数の個数: 40

約数和(自身を含む): 40920000

約数和(自身を除く): 23488720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 1999, 2180, 3998, 4360, 7996, 8720, 9995, 15992, 19990, 31984, 39980, 79960, 159920, 217891, 435782, 871564, 1089455, 1743128, 2178910, 3486256, 4357820, 8715640, 17431280]

約数ペア:

[(1, 17431280), (2, 8715640), (4, 4357820), (5, 3486256), (8, 2178910), (10, 1743128), (16, 1089455), (20, 871564), (40, 435782), (80, 217891), (109, 159920), (218, 79960), (436, 39980), (545, 31984), (872, 19990), (1090, 15992), (1744, 9995), (1999, 8720), (2180, 7996), (3998, 4360)]