9720520

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{499}}^1$

素因数の和:997

約数の個数: 32

約数和(自身を含む): 21960000

約数和(自身を除く): 12239480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 499, 974, 998, 1948, 1996, 2435, 2495, 3896, 3992, 4870, 4990, 9740, 9980, 19480, 19960, 243013, 486026, 972052, 1215065, 1944104, 2430130, 4860260, 9720520]

約数ペア:

[(1, 9720520), (2, 4860260), (4, 2430130), (5, 1944104), (8, 1215065), (10, 972052), (20, 486026), (40, 243013), (487, 19960), (499, 19480), (974, 9980), (998, 9740), (1948, 4990), (1996, 4870), (2435, 3992), (2495, 3896)]