21565980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{39937}}^1$

素因数の和:39955

約数の個数: 48

約数和(自身を含む): 67095840

約数和(自身を除く): 45529860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 180, 270, 540, 39937, 79874, 119811, 159748, 199685, 239622, 359433, 399370, 479244, 599055, 718866, 798740, 1078299, 1198110, 1437732, 1797165, 2156598, 2396220, 3594330, 4313196, 5391495, 7188660, 10782990, 21565980]

約数ペア:

[(1, 21565980), (2, 10782990), (3, 7188660), (4, 5391495), (5, 4313196), (6, 3594330), (9, 2396220), (10, 2156598), (12, 1797165), (15, 1437732), (18, 1198110), (20, 1078299), (27, 798740), (30, 718866), (36, 599055), (45, 479244), (54, 399370), (60, 359433), (90, 239622), (108, 199685), (135, 159748), (180, 119811), (270, 79874), (540, 39937)]