20662240

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1451}}^1$

素因数の和:1555

約数の個数: 48

約数和(自身を含む): 49397040

約数和(自身を除く): 28734800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1451, 1780, 2848, 2902, 3560, 5804, 7120, 7255, 11608, 14240, 14510, 23216, 29020, 46432, 58040, 116080, 129139, 232160, 258278, 516556, 645695, 1033112, 1291390, 2066224, 2582780, 4132448, 5165560, 10331120, 20662240]

約数ペア:

[(1, 20662240), (2, 10331120), (4, 5165560), (5, 4132448), (8, 2582780), (10, 2066224), (16, 1291390), (20, 1033112), (32, 645695), (40, 516556), (80, 258278), (89, 232160), (160, 129139), (178, 116080), (356, 58040), (445, 46432), (712, 29020), (890, 23216), (1424, 14510), (1451, 14240), (1780, 11608), (2848, 7255), (2902, 7120), (3560, 5804)]