990128080

素因数分解:

$2^4\times 5^1\times {\mathrm{1511}}^1\times {\mathrm{8191}}^1$

素因数の和:9715

約数の個数: 40

約数和(自身を含む): 2303852544

約数和(自身を除く): 1313724464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1511, 3022, 6044, 7555, 8191, 12088, 15110, 16382, 24176, 30220, 32764, 40955, 60440, 65528, 81910, 120880, 131056, 163820, 327640, 655280, 12376601, 24753202, 49506404, 61883005, 99012808, 123766010, 198025616, 247532020, 495064040, 990128080]

約数ペア:

[(1, 990128080), (2, 495064040), (4, 247532020), (5, 198025616), (8, 123766010), (10, 99012808), (16, 61883005), (20, 49506404), (40, 24753202), (80, 12376601), (1511, 655280), (3022, 327640), (6044, 163820), (7555, 131056), (8191, 120880), (12088, 81910), (15110, 65528), (16382, 60440), (24176, 40955), (30220, 32764)]