159440

素因数分解:

$2^4\times 5^1\times {\mathrm{1993}}^1$

素因数の和:2006

約数の個数: 20

約数和(自身を含む): 370884

約数和(自身を除く): 211444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1993, 3986, 7972, 9965, 15944, 19930, 31888, 39860, 79720, 159440]

約数ペア:

[(1, 159440), (2, 79720), (4, 39860), (5, 31888), (8, 19930), (10, 15944), (16, 9965), (20, 7972), (40, 3986), (80, 1993)]