21252840

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25301}}^1$

素因数の和:25322

約数の個数: 64

約数和(自身を含む): 72869760

約数和(自身を除く): 51616920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25301, 50602, 75903, 101204, 126505, 151806, 177107, 202408, 253010, 303612, 354214, 379515, 506020, 531321, 607224, 708428, 759030, 885535, 1012040, 1062642, 1416856, 1518060, 1771070, 2125284, 2656605, 3036120, 3542140, 4250568, 5313210, 7084280, 10626420, 21252840]

約数ペア:

[(1, 21252840), (2, 10626420), (3, 7084280), (4, 5313210), (5, 4250568), (6, 3542140), (7, 3036120), (8, 2656605), (10, 2125284), (12, 1771070), (14, 1518060), (15, 1416856), (20, 1062642), (21, 1012040), (24, 885535), (28, 759030), (30, 708428), (35, 607224), (40, 531321), (42, 506020), (56, 379515), (60, 354214), (70, 303612), (84, 253010), (105, 202408), (120, 177107), (140, 151806), (168, 126505), (210, 101204), (280, 75903), (420, 50602), (840, 25301)]