19131680

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1097}}^1$

素因数の和:1221

約数の個数: 48

約数和(自身を含む): 45654840

約数和(自身を除く): 26523160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1097, 1744, 2180, 2194, 3488, 4360, 4388, 5485, 8720, 8776, 10970, 17440, 17552, 21940, 35104, 43880, 87760, 119573, 175520, 239146, 478292, 597865, 956584, 1195730, 1913168, 2391460, 3826336, 4782920, 9565840, 19131680]

約数ペア:

[(1, 19131680), (2, 9565840), (4, 4782920), (5, 3826336), (8, 2391460), (10, 1913168), (16, 1195730), (20, 956584), (32, 597865), (40, 478292), (80, 239146), (109, 175520), (160, 119573), (218, 87760), (436, 43880), (545, 35104), (872, 21940), (1090, 17552), (1097, 17440), (1744, 10970), (2180, 8776), (2194, 8720), (3488, 5485), (4360, 4388)]