19645840

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5711}}^1$

素因数の和:5767

約数の個数: 40

約数和(自身を含む): 46747008

約数和(自身を除く): 27101168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5711, 11422, 22844, 28555, 45688, 57110, 91376, 114220, 228440, 245573, 456880, 491146, 982292, 1227865, 1964584, 2455730, 3929168, 4911460, 9822920, 19645840]

約数ペア:

[(1, 19645840), (2, 9822920), (4, 4911460), (5, 3929168), (8, 2455730), (10, 1964584), (16, 1227865), (20, 982292), (40, 491146), (43, 456880), (80, 245573), (86, 228440), (172, 114220), (215, 91376), (344, 57110), (430, 45688), (688, 28555), (860, 22844), (1720, 11422), (3440, 5711)]