20499080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{409}}^1$

素因数の和:606

約数の個数: 64

約数和(自身を含む): 53136000

約数和(自身を除く): 32636920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 179, 280, 358, 409, 716, 818, 895, 1253, 1432, 1636, 1790, 2045, 2506, 2863, 3272, 3580, 4090, 5012, 5726, 6265, 7160, 8180, 10024, 11452, 12530, 14315, 16360, 22904, 25060, 28630, 50120, 57260, 73211, 114520, 146422, 292844, 366055, 512477, 585688, 732110, 1024954, 1464220, 2049908, 2562385, 2928440, 4099816, 5124770, 10249540, 20499080]

約数ペア:

[(1, 20499080), (2, 10249540), (4, 5124770), (5, 4099816), (7, 2928440), (8, 2562385), (10, 2049908), (14, 1464220), (20, 1024954), (28, 732110), (35, 585688), (40, 512477), (56, 366055), (70, 292844), (140, 146422), (179, 114520), (280, 73211), (358, 57260), (409, 50120), (716, 28630), (818, 25060), (895, 22904), (1253, 16360), (1432, 14315), (1636, 12530), (1790, 11452), (2045, 10024), (2506, 8180), (2863, 7160), (3272, 6265), (3580, 5726), (4090, 5012)]