18513820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2297}}^1$

素因数の和:2350

約数の個数: 48

約数和(自身を含む): 43239168

約数和(自身を除く): 24725348

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 2297, 4030, 4594, 8060, 9188, 11485, 22970, 29861, 45940, 59722, 71207, 119444, 142414, 149305, 284828, 298610, 356035, 597220, 712070, 925691, 1424140, 1851382, 3702764, 4628455, 9256910, 18513820]

約数ペア:

[(1, 18513820), (2, 9256910), (4, 4628455), (5, 3702764), (10, 1851382), (13, 1424140), (20, 925691), (26, 712070), (31, 597220), (52, 356035), (62, 298610), (65, 284828), (124, 149305), (130, 142414), (155, 119444), (260, 71207), (310, 59722), (403, 45940), (620, 29861), (806, 22970), (1612, 11485), (2015, 9188), (2297, 8060), (4030, 4594)]