19870040

素因数分解:

$2^3\times 5^1\times {\mathrm{383}}^1\times {\mathrm{1297}}^1$

素因数の和:1691

約数の個数: 32

約数和(自身を含む): 44858880

約数和(自身を除く): 24988840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 383, 766, 1297, 1532, 1915, 2594, 3064, 3830, 5188, 6485, 7660, 10376, 12970, 15320, 25940, 51880, 496751, 993502, 1987004, 2483755, 3974008, 4967510, 9935020, 19870040]

約数ペア:

[(1, 19870040), (2, 9935020), (4, 4967510), (5, 3974008), (8, 2483755), (10, 1987004), (20, 993502), (40, 496751), (383, 51880), (766, 25940), (1297, 15320), (1532, 12970), (1915, 10376), (2594, 7660), (3064, 6485), (3830, 5188)]