28072120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{859}}^1$

素因数の和:932

約数の個数: 64

約数和(自身を含む): 68112000

約数和(自身を除く): 40039880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 760, 817, 859, 860, 1634, 1718, 1720, 3268, 3436, 4085, 4295, 6536, 6872, 8170, 8590, 16321, 16340, 17180, 32642, 32680, 34360, 36937, 65284, 73874, 81605, 130568, 147748, 163210, 184685, 295496, 326420, 369370, 652840, 701803, 738740, 1403606, 1477480, 2807212, 3509015, 5614424, 7018030, 14036060, 28072120]

約数ペア:

[(1, 28072120), (2, 14036060), (4, 7018030), (5, 5614424), (8, 3509015), (10, 2807212), (19, 1477480), (20, 1403606), (38, 738740), (40, 701803), (43, 652840), (76, 369370), (86, 326420), (95, 295496), (152, 184685), (172, 163210), (190, 147748), (215, 130568), (344, 81605), (380, 73874), (430, 65284), (760, 36937), (817, 34360), (859, 32680), (860, 32642), (1634, 17180), (1718, 16340), (1720, 16321), (3268, 8590), (3436, 8170), (4085, 6872), (4295, 6536)]