21161260

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{571}}^1$

素因数の和:706

約数の個数: 48

約数和(自身を含む): 47567520

約数和(自身を除く): 26406260

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 109, 170, 218, 340, 436, 545, 571, 1090, 1142, 1853, 2180, 2284, 2855, 3706, 5710, 7412, 9265, 9707, 11420, 18530, 19414, 37060, 38828, 48535, 62239, 97070, 124478, 194140, 248956, 311195, 622390, 1058063, 1244780, 2116126, 4232252, 5290315, 10580630, 21161260]

約数ペア:

[(1, 21161260), (2, 10580630), (4, 5290315), (5, 4232252), (10, 2116126), (17, 1244780), (20, 1058063), (34, 622390), (68, 311195), (85, 248956), (109, 194140), (170, 124478), (218, 97070), (340, 62239), (436, 48535), (545, 38828), (571, 37060), (1090, 19414), (1142, 18530), (1853, 11420), (2180, 9707), (2284, 9265), (2855, 7412), (3706, 5710)]