21137080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12289}}^1$

素因数の和:12343

約数の個数: 32

約数和(自身を含む): 48668400

約数和(自身を除く): 27531320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12289, 24578, 49156, 61445, 98312, 122890, 245780, 491560, 528427, 1056854, 2113708, 2642135, 4227416, 5284270, 10568540, 21137080]

約数ペア:

[(1, 21137080), (2, 10568540), (4, 5284270), (5, 4227416), (8, 2642135), (10, 2113708), (20, 1056854), (40, 528427), (43, 491560), (86, 245780), (172, 122890), (215, 98312), (344, 61445), (430, 49156), (860, 24578), (1720, 12289)]