81509080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47389}}^1$

素因数の和:47443

約数の個数: 32

約数和(自身を含む): 187664400

約数和(自身を除く): 106155320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47389, 94778, 189556, 236945, 379112, 473890, 947780, 1895560, 2037727, 4075454, 8150908, 10188635, 16301816, 20377270, 40754540, 81509080]

約数ペア:

[(1, 81509080), (2, 40754540), (4, 20377270), (5, 16301816), (8, 10188635), (10, 8150908), (20, 4075454), (40, 2037727), (43, 1895560), (86, 947780), (172, 473890), (215, 379112), (344, 236945), (430, 189556), (860, 94778), (1720, 47389)]