647082020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2488777}}^1$

素因数の和:2488799

約数の個数: 24

約数和(自身を含む): 1463401464

約数和(自身を除く): 816319444

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2488777, 4977554, 9955108, 12443885, 24887770, 32354101, 49775540, 64708202, 129416404, 161770505, 323541010, 647082020]

約数ペア:

[(1, 647082020), (2, 323541010), (4, 161770505), (5, 129416404), (10, 64708202), (13, 49775540), (20, 32354101), (26, 24887770), (52, 12443885), (65, 9955108), (130, 4977554), (260, 2488777)]