19971880

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2239}}^1$

素因数の和:2473

約数の個数: 32

約数和(自身を含む): 45158400

約数和(自身を除く): 25186520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 2239, 4460, 4478, 8920, 8956, 11195, 17912, 22390, 44780, 89560, 499297, 998594, 1997188, 2496485, 3994376, 4992970, 9985940, 19971880]

約数ペア:

[(1, 19971880), (2, 9985940), (4, 4992970), (5, 3994376), (8, 2496485), (10, 1997188), (20, 998594), (40, 499297), (223, 89560), (446, 44780), (892, 22390), (1115, 17912), (1784, 11195), (2230, 8956), (2239, 8920), (4460, 4478)]