21390180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50929}}^1$

素因数の和:50948

約数の個数: 48

約数和(自身を含む): 68449920

約数和(自身を除く): 47059740

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50929, 101858, 152787, 203716, 254645, 305574, 356503, 509290, 611148, 713006, 763935, 1018580, 1069509, 1426012, 1527870, 1782515, 2139018, 3055740, 3565030, 4278036, 5347545, 7130060, 10695090, 21390180]

約数ペア:

[(1, 21390180), (2, 10695090), (3, 7130060), (4, 5347545), (5, 4278036), (6, 3565030), (7, 3055740), (10, 2139018), (12, 1782515), (14, 1527870), (15, 1426012), (20, 1069509), (21, 1018580), (28, 763935), (30, 713006), (35, 611148), (42, 509290), (60, 356503), (70, 305574), (84, 254645), (105, 203716), (140, 152787), (210, 101858), (420, 50929)]