26428660

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 57657600

約数和(自身を除く): 31228940

約数列:

[1, 2, 4, 5, 10, 20, 43, 79, 86, 158, 172, 215, 316, 389, 395, 430, 778, 790, 860, 1556, 1580, 1945, 3397, 3890, 6794, 7780, 13588, 16727, 16985, 30731, 33454, 33970, 61462, 66908, 67940, 83635, 122924, 153655, 167270, 307310, 334540, 614620, 1321433, 2642866, 5285732, 6607165, 13214330, 26428660]

約数ペア:

[(1, 26428660), (2, 13214330), (4, 6607165), (5, 5285732), (10, 2642866), (20, 1321433), (43, 614620), (79, 334540), (86, 307310), (158, 167270), (172, 153655), (215, 122924), (316, 83635), (389, 67940), (395, 66908), (430, 61462), (778, 33970), (790, 33454), (860, 30731), (1556, 16985), (1580, 16727), (1945, 13588), (3397, 7780), (3890, 6794)]