21277720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27997}}^1$

素因数の和:28027

約数の個数: 32

約数和(自身を含む): 50396400

約数和(自身を除く): 29118680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27997, 55994, 111988, 139985, 223976, 279970, 531943, 559940, 1063886, 1119880, 2127772, 2659715, 4255544, 5319430, 10638860, 21277720]

約数ペア:

[(1, 21277720), (2, 10638860), (4, 5319430), (5, 4255544), (8, 2659715), (10, 2127772), (19, 1119880), (20, 1063886), (38, 559940), (40, 531943), (76, 279970), (95, 223976), (152, 139985), (190, 111988), (380, 55994), (760, 27997)]