18517940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{379}}^1$

素因数の和:744

約数の個数: 48

約数和(自身を含む): 44688000

約数和(自身を除く): 26170060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 349, 379, 698, 758, 1396, 1516, 1745, 1895, 2443, 2653, 3490, 3790, 4886, 5306, 6980, 7580, 9772, 10612, 12215, 13265, 24430, 26530, 48860, 53060, 132271, 264542, 529084, 661355, 925897, 1322710, 1851794, 2645420, 3703588, 4629485, 9258970, 18517940]

約数ペア:

[(1, 18517940), (2, 9258970), (4, 4629485), (5, 3703588), (7, 2645420), (10, 1851794), (14, 1322710), (20, 925897), (28, 661355), (35, 529084), (70, 264542), (140, 132271), (349, 53060), (379, 48860), (698, 26530), (758, 24430), (1396, 13265), (1516, 12215), (1745, 10612), (1895, 9772), (2443, 7580), (2653, 6980), (3490, 5306), (3790, 4886)]