1277999720

素因数分解:

$2^3\times 5^1\times {\mathrm{31949993}}^1$

素因数の和:31950004

約数の個数: 16

約数和(自身を含む): 2875499460

約数和(自身を除く): 1597499740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 31949993, 63899986, 127799972, 159749965, 255599944, 319499930, 638999860, 1277999720]

約数ペア:

[(1, 1277999720), (2, 638999860), (4, 319499930), (5, 255599944), (8, 159749965), (10, 127799972), (20, 63899986), (40, 31949993)]