21005488

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{9871}}^1$

素因数の和:9905

約数の個数: 40

約数和(自身を含む): 48965120

約数和(自身を除く): 27959632

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 9871, 19742, 39484, 69097, 78968, 138194, 157936, 187549, 276388, 375098, 552776, 750196, 1105552, 1312843, 1500392, 2625686, 3000784, 5251372, 10502744, 21005488]

約数ペア:

[(1, 21005488), (2, 10502744), (4, 5251372), (7, 3000784), (8, 2625686), (14, 1500392), (16, 1312843), (19, 1105552), (28, 750196), (38, 552776), (56, 375098), (76, 276388), (112, 187549), (133, 157936), (152, 138194), (266, 78968), (304, 69097), (532, 39484), (1064, 19742), (2128, 9871)]