21539560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1789}}^1$

素因数の和:1850

約数の個数: 64

約数和(自身を含む): 56707200

約数和(自身を除く): 35167640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1789, 2408, 3010, 3578, 6020, 7156, 8945, 12040, 12523, 14312, 17890, 25046, 35780, 50092, 62615, 71560, 76927, 100184, 125230, 153854, 250460, 307708, 384635, 500920, 538489, 615416, 769270, 1076978, 1538540, 2153956, 2692445, 3077080, 4307912, 5384890, 10769780, 21539560]

約数ペア:

[(1, 21539560), (2, 10769780), (4, 5384890), (5, 4307912), (7, 3077080), (8, 2692445), (10, 2153956), (14, 1538540), (20, 1076978), (28, 769270), (35, 615416), (40, 538489), (43, 500920), (56, 384635), (70, 307708), (86, 250460), (140, 153854), (172, 125230), (215, 100184), (280, 76927), (301, 71560), (344, 62615), (430, 50092), (602, 35780), (860, 25046), (1204, 17890), (1505, 14312), (1720, 12523), (1789, 12040), (2408, 8945), (3010, 7156), (3578, 6020)]