28105520

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1367}}^1$

素因数の和:1637

約数の個数: 40

約数和(自身を含む): 65647584

約数和(自身を除く): 37542064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 1028, 1285, 1367, 2056, 2570, 2734, 4112, 5140, 5468, 6835, 10280, 10936, 13670, 20560, 21872, 27340, 54680, 109360, 351319, 702638, 1405276, 1756595, 2810552, 3513190, 5621104, 7026380, 14052760, 28105520]

約数ペア:

[(1, 28105520), (2, 14052760), (4, 7026380), (5, 5621104), (8, 3513190), (10, 2810552), (16, 1756595), (20, 1405276), (40, 702638), (80, 351319), (257, 109360), (514, 54680), (1028, 27340), (1285, 21872), (1367, 20560), (2056, 13670), (2570, 10936), (2734, 10280), (4112, 6835), (5140, 5468)]