20477120

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{719}}^1$

素因数の和:825

約数の個数: 56

約数和(自身を含む): 49377600

約数和(自身を除く): 28900480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 712, 719, 890, 1424, 1438, 1780, 2848, 2876, 3560, 3595, 5696, 5752, 7120, 7190, 11504, 14240, 14380, 23008, 28480, 28760, 46016, 57520, 63991, 115040, 127982, 230080, 255964, 319955, 511928, 639910, 1023856, 1279820, 2047712, 2559640, 4095424, 5119280, 10238560, 20477120]

約数ペア:

[(1, 20477120), (2, 10238560), (4, 5119280), (5, 4095424), (8, 2559640), (10, 2047712), (16, 1279820), (20, 1023856), (32, 639910), (40, 511928), (64, 319955), (80, 255964), (89, 230080), (160, 127982), (178, 115040), (320, 63991), (356, 57520), (445, 46016), (712, 28760), (719, 28480), (890, 23008), (1424, 14380), (1438, 14240), (1780, 11504), (2848, 7190), (2876, 7120), (3560, 5752), (3595, 5696)]