21437080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76561}}^1$

素因数の和:76579

約数の個数: 32

約数和(自身を含む): 55124640

約数和(自身を除く): 33687560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76561, 153122, 306244, 382805, 535927, 612488, 765610, 1071854, 1531220, 2143708, 2679635, 3062440, 4287416, 5359270, 10718540, 21437080]

約数ペア:

[(1, 21437080), (2, 10718540), (4, 5359270), (5, 4287416), (7, 3062440), (8, 2679635), (10, 2143708), (14, 1531220), (20, 1071854), (28, 765610), (35, 612488), (40, 535927), (56, 382805), (70, 306244), (140, 153122), (280, 76561)]