18640720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{33287}}^1$

素因数の和:33307

約数の個数: 40

約数和(自身を含む): 49532544

約数和(自身を除く): 30891824

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 33287, 66574, 133148, 166435, 233009, 266296, 332870, 466018, 532592, 665740, 932036, 1165045, 1331480, 1864072, 2330090, 2662960, 3728144, 4660180, 9320360, 18640720]

約数ペア:

[(1, 18640720), (2, 9320360), (4, 4660180), (5, 3728144), (7, 2662960), (8, 2330090), (10, 1864072), (14, 1331480), (16, 1165045), (20, 932036), (28, 665740), (35, 532592), (40, 466018), (56, 332870), (70, 266296), (80, 233009), (112, 166435), (140, 133148), (280, 66574), (560, 33287)]