21890120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{78179}}^1$

素因数の和:78197

約数の個数: 32

約数和(自身を含む): 56289600

約数和(自身を除く): 34399480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 78179, 156358, 312716, 390895, 547253, 625432, 781790, 1094506, 1563580, 2189012, 2736265, 3127160, 4378024, 5472530, 10945060, 21890120]

約数ペア:

[(1, 21890120), (2, 10945060), (4, 5472530), (5, 4378024), (7, 3127160), (8, 2736265), (10, 2189012), (14, 1563580), (20, 1094506), (28, 781790), (35, 625432), (40, 547253), (56, 390895), (70, 312716), (140, 156358), (280, 78179)]