18303280

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2099}}^1$

素因数の和:2221

約数の個数: 40

約数和(自身を含む): 42966000

約数和(自身を除く): 24662720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2099, 2180, 4198, 4360, 8396, 8720, 10495, 16792, 20990, 33584, 41980, 83960, 167920, 228791, 457582, 915164, 1143955, 1830328, 2287910, 3660656, 4575820, 9151640, 18303280]

約数ペア:

[(1, 18303280), (2, 9151640), (4, 4575820), (5, 3660656), (8, 2287910), (10, 1830328), (16, 1143955), (20, 915164), (40, 457582), (80, 228791), (109, 167920), (218, 83960), (436, 41980), (545, 33584), (872, 20990), (1090, 16792), (1744, 10495), (2099, 8720), (2180, 8396), (4198, 4360)]