204568520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{393401}}^1$

素因数の和:393425

約数の個数: 32

約数和(自身を含む): 495686520

約数和(自身を除く): 291118000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 393401, 786802, 1573604, 1967005, 3147208, 3934010, 5114213, 7868020, 10228426, 15736040, 20456852, 25571065, 40913704, 51142130, 102284260, 204568520]

約数ペア:

[(1, 204568520), (2, 102284260), (4, 51142130), (5, 40913704), (8, 25571065), (10, 20456852), (13, 15736040), (20, 10228426), (26, 7868020), (40, 5114213), (52, 3934010), (65, 3147208), (104, 1967005), (130, 1573604), (260, 786802), (520, 393401)]