204520520

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{10499}}^1$

素因数の和:10997

約数の個数: 32

約数和(自身を含む): 461160000

約数和(自身を除く): 256639480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1948, 2435, 3896, 4870, 9740, 10499, 19480, 20998, 41996, 52495, 83992, 104990, 209980, 419960, 5113013, 10226026, 20452052, 25565065, 40904104, 51130130, 102260260, 204520520]

約数ペア:

[(1, 204520520), (2, 102260260), (4, 51130130), (5, 40904104), (8, 25565065), (10, 20452052), (20, 10226026), (40, 5113013), (487, 419960), (974, 209980), (1948, 104990), (2435, 83992), (3896, 52495), (4870, 41996), (9740, 20998), (10499, 19480)]