21283480

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11321}}^1$

素因数の和:11379

約数の個数: 32

約数和(自身を含む): 48911040

約数和(自身を除く): 27627560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11321, 22642, 45284, 56605, 90568, 113210, 226420, 452840, 532087, 1064174, 2128348, 2660435, 4256696, 5320870, 10641740, 21283480]

約数ペア:

[(1, 21283480), (2, 10641740), (4, 5320870), (5, 4256696), (8, 2660435), (10, 2128348), (20, 1064174), (40, 532087), (47, 452840), (94, 226420), (188, 113210), (235, 90568), (376, 56605), (470, 45284), (940, 22642), (1880, 11321)]