81287220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193541}}^1$

素因数の和:193560

約数の個数: 48

約数和(自身を含む): 260120448

約数和(自身を除く): 178833228

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193541, 387082, 580623, 774164, 967705, 1161246, 1354787, 1935410, 2322492, 2709574, 2903115, 3870820, 4064361, 5419148, 5806230, 6773935, 8128722, 11612460, 13547870, 16257444, 20321805, 27095740, 40643610, 81287220]

約数ペア:

[(1, 81287220), (2, 40643610), (3, 27095740), (4, 20321805), (5, 16257444), (6, 13547870), (7, 11612460), (10, 8128722), (12, 6773935), (14, 5806230), (15, 5419148), (20, 4064361), (21, 3870820), (28, 2903115), (30, 2709574), (35, 2322492), (42, 1935410), (60, 1354787), (70, 1161246), (84, 967705), (105, 774164), (140, 580623), (210, 387082), (420, 193541)]