128908520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{247901}}^1$

素因数の和:247925

約数の個数: 32

約数和(自身を含む): 312356520

約数和(自身を除く): 183448000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 247901, 495802, 991604, 1239505, 1983208, 2479010, 3222713, 4958020, 6445426, 9916040, 12890852, 16113565, 25781704, 32227130, 64454260, 128908520]

約数ペア:

[(1, 128908520), (2, 64454260), (4, 32227130), (5, 25781704), (8, 16113565), (10, 12890852), (13, 9916040), (20, 6445426), (26, 4958020), (40, 3222713), (52, 2479010), (65, 1983208), (104, 1239505), (130, 991604), (260, 495802), (520, 247901)]