20765720

素因数分解:

$2^3\times 5^1\times {\mathrm{229}}^1\times {\mathrm{2267}}^1$

素因数の和:2507

約数の個数: 32

約数和(自身を含む): 46947600

約数和(自身を除く): 26181880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 229, 458, 916, 1145, 1832, 2267, 2290, 4534, 4580, 9068, 9160, 11335, 18136, 22670, 45340, 90680, 519143, 1038286, 2076572, 2595715, 4153144, 5191430, 10382860, 20765720]

約数ペア:

[(1, 20765720), (2, 10382860), (4, 5191430), (5, 4153144), (8, 2595715), (10, 2076572), (20, 1038286), (40, 519143), (229, 90680), (458, 45340), (916, 22670), (1145, 18136), (1832, 11335), (2267, 9160), (2290, 9068), (4534, 4580)]