280272520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{636983}}^1$

素因数の和:637005

約数の個数: 32

約数和(自身を含む): 687942720

約数和(自身を除く): 407670200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 636983, 1273966, 2547932, 3184915, 5095864, 6369830, 7006813, 12739660, 14013626, 25479320, 28027252, 35034065, 56054504, 70068130, 140136260, 280272520]

約数ペア:

[(1, 280272520), (2, 140136260), (4, 70068130), (5, 56054504), (8, 35034065), (10, 28027252), (11, 25479320), (20, 14013626), (22, 12739660), (40, 7006813), (44, 6369830), (55, 5095864), (88, 3184915), (110, 2547932), (220, 1273966), (440, 636983)]