20071280

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2819}}^1$

素因数の和:2921

約数の個数: 40

約数和(自身を含む): 47206800

約数和(自身を除く): 27135520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2819, 3560, 5638, 7120, 11276, 14095, 22552, 28190, 45104, 56380, 112760, 225520, 250891, 501782, 1003564, 1254455, 2007128, 2508910, 4014256, 5017820, 10035640, 20071280]

約数ペア:

[(1, 20071280), (2, 10035640), (4, 5017820), (5, 4014256), (8, 2508910), (10, 2007128), (16, 1254455), (20, 1003564), (40, 501782), (80, 250891), (89, 225520), (178, 112760), (356, 56380), (445, 45104), (712, 28190), (890, 22552), (1424, 14095), (1780, 11276), (2819, 7120), (3560, 5638)]