2019691880

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{639143}}^1$

素因数の和:639233

約数の個数: 32

約数和(自身を含む): 4601836800

約数和(自身を除く): 2582144920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 639143, 1278286, 2556572, 3195715, 5113144, 6391430, 12782860, 25565720, 50492297, 100984594, 201969188, 252461485, 403938376, 504922970, 1009845940, 2019691880]

約数ペア:

[(1, 2019691880), (2, 1009845940), (4, 504922970), (5, 403938376), (8, 252461485), (10, 201969188), (20, 100984594), (40, 50492297), (79, 25565720), (158, 12782860), (316, 6391430), (395, 5113144), (632, 3195715), (790, 2556572), (1580, 1278286), (3160, 639143)]