28130720

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1613}}^1$

素因数の和:1737

約数の個数: 48

約数和(自身を含む): 67110120

約数和(自身を除く): 38979400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1613, 1744, 2180, 3226, 3488, 4360, 6452, 8065, 8720, 12904, 16130, 17440, 25808, 32260, 51616, 64520, 129040, 175817, 258080, 351634, 703268, 879085, 1406536, 1758170, 2813072, 3516340, 5626144, 7032680, 14065360, 28130720]

約数ペア:

[(1, 28130720), (2, 14065360), (4, 7032680), (5, 5626144), (8, 3516340), (10, 2813072), (16, 1758170), (20, 1406536), (32, 879085), (40, 703268), (80, 351634), (109, 258080), (160, 175817), (218, 129040), (436, 64520), (545, 51616), (872, 32260), (1090, 25808), (1613, 17440), (1744, 16130), (2180, 12904), (3226, 8720), (3488, 8065), (4360, 6452)]